[Python] Why is Python Turtle listen() not working?

I am very, and by that I mean very new to Python (i know literally nothing). I'm attemtping to create a little game using the turtle module, and following a tutorial I don't see the listen() function working

here's my code I'm trying to create a controllable character

from turtle import *

#background
Screen().bgcolor("orange")

#player

pl = Turtle()
pl.color('dodgerblue')
pl.shape('turtle')
pl.penup()

def turnleft():
player.left(30)

turtle.listen()
onkeypress(turnleft, "Left")

speed = 1
while True:
pl.forward(speed)

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