[Python] Making Turtle Graphics Python game start only after main menu button has been clicked

I'm currently making a Python turtle graphics game, it's a pong game where there is a 2 paddles and they pass the ball to each other, once ball touches each side the player gets a point, the game is fully functional in 1920x1080 res.

The thing is I made a main menu type of thing where the game starts after the Start button has been clicked, the menu works exactly as intended, but even before I press start, the main game loop starts once canvas is opened, not when start button is clicked, so it looks like this: https://i.sstatic.net/u6xQR.jpg, this is what it looks like after menu button has been pressed: https://i.sstatic.net/1RC9Q.jpg

Here is the whole code, sorry if it's quite long I have been trying to solve it for 2 days

import turtle
import time

pong = turtle.Screen()
pong.title("My First Project")
pong.bgcolor("black")
pong.setup(width=1920,height=1080)
pong.tracer(0)


#Step 1: Create Both Padles and Ball(Done)
#Step 2: Movement Functions and Linking them to Keyboard(Done)
#Step 3: Scoring System and Updating it(Done)
#Step 4: Winning Screen(Done)
#Step 5: Collision with Paddles and Balls(Done)
#Step 5: Main Menu(In Progress)

#Creating Menu
mainCanvas = turtle.Turtle()
mainCanvas.color("cyan")
mainCanvas.hideturtle
mainCanvas.speed(0)
mainCanvas.begin_fill()
#list to make the main menu bg
fd_list1=[(90, 540), (0, 960), (270, 1080),(180,1920),(90,1080),(0,960)]
for hd1, fwd1 in fd_list1:
mainCanvas.setheading(hd1)
mainCanvas.fd(fwd1)
mainCanvas.end_fill()

#Creating Title
mainTitle = turtle.Turtle()
mainTitle.penup()
mainTitle.speed(0)
mainTitle.hideturtle()
mainTitle.goto(0,270)
mainTitle.write("Main Menu",align="center",font=("a Absolute Empire",60,"normal"))

#Create Start Option
startGame = turtle.Turtle()
startGame.speed(0)
startGame.penup()
startGame.goto(0,100)
pong.register_shape("start_400x150.gif") #PNG for start button
startGame.shape("start_400x150.gif") #Applying the PNG
startGame.shapesize(stretch_len=20,stretch_wid=20)

#Start Click Function
def clickStart(x,y):
if x > startGame.xcor() - 200 and x < startGame.xcor() + 200 and y > startGame.ycor() - 75 and y < startGame.ycor() + 75:
time.sleep(0.5)
mainTitle.clear()
pong.bgcolor("black")
startGame.hideturtle()

#Get rid of Main Menu
mainCanvas.color("black")
mainCanvas.goto(0,0)
mainCanvas.begin_fill()
#List to change canvas to desired color once clicked
fd_list=[(90, 540), (0, 960), (270, 1080),(180,1920),(90,1080),(0,960)]
for hd, fwd in fd_list:
mainCanvas.setheading(hd)
mainCanvas.fd(fwd)
mainCanvas.end_fill()

#Hide Button
startGame.goto(0,5000)

#Key Binding Main Menu
pong.listen()
pong.onscreenclick(clickStart,1)

#creating Paddle A, Player 1(left Side)
paddleA = turtle.Turtle()
paddleA.speed(0)
paddleA.shape("square")
paddleA.shapesize(9,1)
paddleA.color("white")
paddleA.penup()
paddleA.goto(-900,0)

#creating Paddle B, Player 2(Right Side)
paddleB = turtle.Turtle()
paddleB.speed(0)
paddleB.shape("square")
paddleB.shapesize(9,1)
paddleB.color("white")
paddleB.penup()
paddleB.goto(900,0)

#creating Ball makes it move in diagonal direction in fixed speed with ball.dx = 3 and ball.dy = 3
#Speed depends on the power of your PC or Mac, you can change dx and dy according to ur computer speed(mine sucks so 3 is pretty fast for me)
ball = turtle.Turtle()
ball.speed(0)
ball.shape("square")
ball.color("white")
ball.shapesize(1.8,1.8)
ball.penup()
ball.goto(0,0)
ball.x = 5
ball.y = 5

#Middle Line
#Creates multiple lines, enumerates them then checks for each enumerate with idx
#t variable is number of turtles, a line that goes down the middle
turtles = [turtle.Turtle() for _ in range(100)]
for idx, t in enumerate(turtles):
t.speed(0)
t.shape("square")
t.shapesize(2,0.1)
t.color("white")
t.penup()
t.goto(0,540-10*idx)

#Movings Functions
#Paddle A Up with (w) key for player A(1)
def paddleAUp():
y = paddleA.ycor()
y += 20
paddleA.sety(y)

#Paddle A Down with (s) Key for player A(1)
def paddleADown():
y = paddleA.ycor()
y -= 20
paddleA.sety(y)

#Paddle B Up with (Up_Arrow) Key for player B(2)
def paddleBUp():
y = paddleB.ycor()
y += 20
paddleB.sety(y)

#Paddle B Down (Down_Arrow) key for player B(2)
def paddleBDown():
y = paddleB.ycor()
y -= 20
paddleB.sety(y)

#Binding the Moving functions to Keyboard
#Pong.listen, listens to keyboard input
pong.listen()

#Moves Paddle A(1) up and down the y axis with (w) and (s) key respectively
pong.onkeypress(paddleAUp,"w")
pong.onkeypress(paddleADown,"s")

#Moves Paddle B(2) up and down the y axis with (Up_Arrow) and (Down_Arrow) key respectively
pong.onkeypress(paddleBUp,"Up")
pong.onkeypress(paddleBDown,"Down")

#Scores
AScore = 0
BScore = 0

#Scoring System for Player A(1)
ScoreSystemA = turtle.Turtle()
ScoreSystemA.pencolor("White")
ScoreSystemA.penup()
ScoreSystemA.setposition(-950,480)
ScoreSystemA.pendown()
ScoreSystemA.write(f"P1 Score: {AScore}",font=("courier",30,"normal"))
ScoreSystemA.hideturtle()

#Scoring System for Player B(2)
ScoreSystemB = turtle.Turtle()
ScoreSystemB.pencolor("White")
ScoreSystemB.penup()
ScoreSystemB.setposition(680,480)
ScoreSystemB.pendown
ScoreSystemB.write(f"P2 Score: {BScore}", font=("courier",30,"normal"))
ScoreSystemB.hideturtle()

#Main Loop To check canvas and update it each millisecond
while True:
pong.update()

#Makes Ball Move
ball.setx(ball.xcor() + ball.x)
ball.sety(ball.ycor() + ball.y)

#Ball Bouncing when it hits edge, Edge Detection at +y
if ball.ycor() > 510:
ball.sety(510)
ball.y = ball.y * -1

#Ball Bouncing when it hits edge, Edge Detection at -y
if ball.ycor() < -510:
ball.sety(-510)
ball.y = ball.y * -1

#Counting scoring system, when Ball goes Behind Paddle the Ball Resets and Goes in the Other Direction
#Which will then update the Score Text at the upper Left Corner
if ball.xcor() > 950:
ball.goto(0,0)
ball.x *= -1
AScore = AScore + 1
ScoreSystemA.clear()
ScoreSystemA.write(f"P1 Score: {AScore}",font=("courier",30,"normal"))

#Same As Above but for Paddle B
if ball.xcor() < -950:
ball.goto(0,0)
ball.x *= -1
BScore = BScore + 1
ScoreSystemB.clear()
ScoreSystemB.write(f"P2 Score: {BScore}", font=("courier",30,"normal"))

#Winning Condition writes Player 1(A) Won and stops the Game
if AScore == 3:
AWin = turtle.Turtle()
AWin.pencolor("White")
AWin.hideturtle()
AWin.penup()
AWin.setposition(0,0)
AWin.pendown()
AWin.write("P1 Wins!",align="center",font=("courier",60,"normal"))
turtles.clear()
turtle.done()

#Same As Above but for Paddle B
if BScore == 3:
BWin = turtle.Turtle()
BWin.pencolor("White")
BWin.hideturtle()
BWin.penup()
BWin.setposition(0,0)
BWin.pendown()
BWin.write("P2 Wins!",align="center",font=("courier",60,"normal"))
turtles.clear()
turtle.done()

#Collision System first 2 conditions are for ball x coordinate to check if it's at the same x value as the paddle
#Third if ball is less than paddle y cor for top half of the paddle
#Fourth if ball is greater than paddle y cor for bottom half of the paddle
if ball.xcor() < -900 and ball.xcor() > -950 and (ball.ycor() < paddleA.ycor() + 72 and ball.ycor() > paddleA.ycor() - 72):
ball.x = ball.x * -1

#Same As Above but for Paddle B
if ball.xcor() > 900 and ball.xcor() < 950 and (ball.ycor() < paddleB.ycor() + 72 and ball.ycor() > paddleB.ycor() - 72):
ball.x = ball.x * -1









here is the bit i'm struggling with:

#Start Click Function
def clickStart(x,y):
if x > startGame.xcor() - 200 and x < startGame.xcor() + 200 and y > startGame.ycor() - 75 and y < startGame.ycor() + 75:
time.sleep(0.5)
mainTitle.clear()
pong.bgcolor("black")
startGame.hideturtle()

#Get rid of Main Menu
mainCanvas.color("black")
mainCanvas.goto(0,0)
mainCanvas.begin_fill()
#List to change canvas to desired color once clicked
fd_list=[(90, 540), (0, 960), (270, 1080),(180,1920),(90,1080),(0,960)]
for hd, fwd in fd_list:
mainCanvas.setheading(hd)
mainCanvas.fd(fwd)
mainCanvas.end_fill()

#Hide Button
startGame.goto(0,5000)

#Key Binding Main Menu
pong.listen()
pong.onscreenclick(clickStart,1)


any help is appreciated

i tried: making a condition where if click happens then the game loop starts, when i did that and i clicked the canvas just turned all black, i think it returned none

i tried: making a second game loop, that stops when clicking the start button, that just broke

What i expected: i run code, game opens and does nothing, till i press the start button then the game starts and it plays.

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