I think you're overthinking it. Making simple games isn't hard. Just sit down one day and write a clone of Tetris in 24 hours, adding some twists of your own if you want. If you do that, you'll be a million steps ahead of anyone who thinks, "I should make a game someday." You'll have learned more than any book or tutorial can teach you, not just about technical matters, but about your own abilities. Or just join a 48 hour game jam and make some small thing with some friends.
After making some small things like that, you'll see how easy it is to just jump into some cool idea you've been thinking about. If you don't do this, and instead just plan out some big multi-person hobby project, there is literally 0% chance it will ever get finished, or even started. It's literally never been done before.