I didn't even attend my first con until I was 24, and only did my first cosplay when I was 25. I'd been doing RenFaire costuming for a few years prior (since probably 19 or 20), but it was a while before I branched into doing specific characters. 22 is not too young to start, or an age that requires you to give it up. The great thing about being older in this hobby is that I have a steady income, plenty of disposable money to spend on cons, comics, and materials, no one's approval to cater to, and vastly more experience at sewing and construction than I would have dreamed of having when I was 16.
Pictures and tutorials from my costuming portfolio at Syagria's Cosplay Site!
Star Trek Original Series Uniform!
Original Creation for AB13
Most Recent Con:
PAX East, Anime Boston 2013