Self taught here, never ever went to art school (I finished high school two years ago, anyway) and I started making webcomics all the way back in 2009 when I was 13, but let's just say both the art quality and the writing style were... dubious, at best, or at least it was so at first.
Nowadays I work professionally as a colorist and an illustrator, and I've made a few scripts for diverse things as well, so I'm rather confident in my abilities.