You're at a crucial peak so I'd look into some classes if you ever have the chance, I am only 21 but every year closes your mind up a little and you want to have it as open as you can for learning...
I mean, I only learned gesture drawing at 18, if I'd learned it younger I'd probably be able to make a career of art. As it is, I never got professional training...wish I had.
Sorry for the ramble xD I just see raw talent in you