My advice, as someone who made some very tiny small shitty games is... just start making them! Pick a game engine (i use gdevelop 5, and i just joined a team to work on a game in gamemaker), i recommend gdevelop 5 (tho its kinda too pro-ai for me), gamemaker or godot (all are free to use, gamemaker just needs a licence if you wanna sell your game). And start small, like tetris small, space shooters small. Just MAKE SOMETHING rahh!!!