I'm 31... but I truly believe people can make good decisions no matter what age they are so don't feel like you have ten years before things get easier or anything like that. Certain things get easier, certain things get harder. It's pretty individual.
I think I'm lucky in that a lot of the "adolescent" stuff didn't happen for me until my early 20s (the idea of "delayed adolescence" is common when you look at queer people's lives) and I think by that time (I came out right before I turned 20), I had a few more "tools" (look, it's my emotional powersaw!) at my disposal to analyse stuff with and so I like to think I got more out of learning how to date and how to be social and what was going on with me internally than I would have if it had all happened when I was a teenager. Plus because I hadn't gone through it in high school, I came out of high school thinking that all that stuff they talk about that's supposed to be so great? That I had missed all that. So I was really happy to find out that wasn't the case and probably appreciated the good and the bad more than if I'd been trying to deal with it while also trying to figure out which university to go to or what I wanted to be when I grew up.
(I'm still not entirely sure what I want to do with my life but as the song says, the most interesting people often don't know even when they're 40.)