32 here. Just got in to game dev in the past year (and got in to C2 in the past couple of months!).
If I was in my early-20's right now, I think I still wouldn't be able to do the work that I do currently. I just didn't have any determination or ambition then. Was more interested in hanging with friends and socializing. Around my mid-20's I switched careers and realized that if you work hard and smart enough, and have just a bit of talent, that you can accomplish shit. Will it be great or amazing? Maybe. But if it isn't, you at least finished something which most people can't even do.
So I'm totally cool with being in my 30's and getting in to game dev. I know how to block time to work. I know how to manage large projects and finish them. I know how to work through "the wall" of any project. These are skills I've picked up over the years in doing multiple creative efforts.