Most missed the point that he is still in High School. IMO the best time to make a career choice for you is now because you're broke already, still single (maybe) and Mom and Dad can help you along (free room and board for another year or two).
Search the net like mentioned. There are some good schools and there is this forum (and others). This is a funny profession as I see it because you don't need a degree from a school you just need to be good and produce consistent quality. The investment is minor compared to other businesses and if you love doing it that's a bonus.
I knew I wanted to work in the electronics industry since I was 6 and took my new reel to reel (remember those!) apart and put it back together. I almost got an a$$ whippin until my parents realized it still worked! I have made a bunch of job changes since I left high school but they are all in the electronics field. I also wanted to do woodworking or cabinet making since h.s. My mom had an antiques business and I spent most of my life around old, well built furniture doing repairs and refinishing, etc. I had to choose one and I'm happy with my choice, but now that I'm older (39) and financially stable I can delve into the woodworking dream via guitar building.
My rambling point is: you're young, live your dream now and if it doesn't work out you will still be young and can find other means to provide an income for you and your family.
Sorry for the long, rambling post!