I'm 26 and have been drawing on-and-off for...14 years, but only realized I love drawing comics in the last 4? Started at a comic-drawing-marathon in college and basically never looked back.
It's been interesting seeing the range of people who do art, since growing up I always thought there were two types of people - the crazy artsy kids who were born holding a pen and had all their notebooks covered in amazing doodles, and everyone else (I thought of myself as the latter). The artsy kids went off to art school or whatever it is they did and became Actual Artists, while everyone else just... could never match up? Only now I'm seeing that's not the case, and that's really refreshing.