If I want to make a game where must I start

Answer 1

Learn tkinter.

Answer 2

For Python you can start with PyGame or Kiwi. There is a free to read book for PyGame : https://inventwithpython.com/pygame/chapters/ . Also you can find a lot of YouTube videos for PyGame.

Answer 3

I would suggest Java if you want to make an android game

Answer 4

Learn C++ it's a powerful language and is supported by many game engines like Unity