Where to begin?

I made the tutorials from website, then shooter tutorial and that guy collecting batteries. It’s only a small piece of what do you really need to know to make some game, i dont know where can i find any other c++ tutorials… Everytime im getting either documentation copy paste or someone says “hey set this variable and it will work” or “u need to override those 2 methods”. But why, why arent such things written in documentation or presented in tutorials?.. I’m stuck, any advice?