Unlike almost everyone here, I don't *know* what I want to do exactly. However, I agree with djnoz in not getting your hopes up for a career in anything in the anime/games/other entertainment industry. If I can somehow get into it (see below) I would take it as a sign and use it to the best of my ability, however, if I never get the chance, that's fine too.
If I were Catholic, I'd probably sign on to one of the more service-oriented (as opposed to contemplative) orders and become a nun, LOL (surprised?).
I'm not though. Since I have a talent for writing and reading (or so I've been told, I'm not bragging on myself because I don't think I'm that talented compared to all the better people out there) and an interest in both, since I want to help people and am not very shy most of the time, I have a few different options open if I can somehow get into the community college with my math skills and with being a dropout from homeschooling (two really big ifs)
My family is pushing me to go into law, to be an attorney. While that seems mildly interesting (more for the chances I'd get to help others and for the money I might make to give to worthy causes and to travel, things I really want to do), and from what I've been reading online at various places could indeed allow me to get into the anime/entertainment industry (because there are several legal issues coming up for both fans and industry, i.e. copyright infringement, creative control, testimony in legal cases, and more).
Nevertheless, I don't know if I'm intelligent enough or would be able to financially support myself to get through 4 years of college and 4 of law school, and by the time I'd actually have a degree, I would probably be at least 30, probably 35-so all the best years of my life would be spent in education and I'd be middle-aged, more than halfway to retirement when I was just starting my career.
I've also looked into journalism: that could allow me to write and travel (both things I love) and all it requires would be two to four years in college, which would allow me to potentially graduate while I'm still in my 20s, and which would possibly give me the opportunity to help others. Problem is, I just don't know if it's for me.
I'm still undecided though, LOL.