How far into art school are you? The things you're interested in are pretty varied fields (the ones related to art). You could talk to people all day long on forums. Find some local shops (not bike shops, design, post, etc) and talk to some people.

BTW, why post production? What aspect do you like of it? Just curious, most kids that go to art school don't aspire to go into production. Not a dis by any means, but most of the people I've talked to in post production "fell into it", didn't go to school for it.

Just stay away from advertising, it will drive you mad and suck out your soul. Other than that, Art Directing is pretty rad.