Programming

I don't think this is a good answer but a funny anecdote. I was pretty obsessed with video games starting with the NES. I got really good with computers, programming, etc and more than 10 years into being a professional software developer, I figured it was time to actually look at making a game, arguably the reason I got into coding to begin with. Turns out that so little about game development is actually coding these days, been that way for decades now.

There are so many parts to making a video game, as you mentioned. If you want to do everything yourself and from scratch, yeah you will need to understand code and physics/math formulas, etc. Maybe some graphic design for the world you're creating, maybe some music and audio effects knowledge. But there are also game engines out there that will do virtually or literally all of this for you.

I guess my real point is, figure out what you enjoy doing, and how you can contribute that to making games. It doesn't matter if you're good at it or don't even know where to start, the important part is that you do start and stick with it.