Start very small, like Footsies small (the game, not the concept.) I tried making a fighting game when I was 18, with a small team, and it really is hard as hell. Not even accounting for balance and any issues that may come up, it's a lot of sweaty days that you won't get back, so you want to make sure you can finish your plate. After having worked in the industry for a time, I have experienced development struggles, and I wasn't even in the dev team itself.
Good luck, for real; next time, try to have something made before posting about it, it'll be better for your mind to get feedback on something you have rather than have many people tell you to stop now or expect something you might not be able to feasibly do.