To be good at something you should have good understanding over it. To have a good understanding you should start from the beginning. This is why I have decided to change my researches towards how to plan a video game. These are the article I read and the video I watched today.
https://kevurugames.com/blog/6-key-stages-of-game-development-from-concept-to-standing-ovation
https://gamemaker.io/en/blog/stages-of-game-development
https://www.youtube.com/watch?v=VYnVyuUOHl8