I spent years going to college to get my BA in political science. I'd been planning on being teacher pretty much as far back as I can remember. Most of my friends are teachers. My dad was a teacher (then he was a high school principal, now he's retired). I started teaching...and found out I hated it. Hated the little punks

Didn't want to teach them the stuff they were supposed to learn, and they didn't want to learn it.
So, I was depressed and had no idea what to do, and was complaining about it all to a friend of mine who's an RN. He told me about a lot of different jobs at the hospital...I thought x-ray sounded interesting, checked out a program at a nearby community college, and now I do that for a living (and my starting pay with a 2-year degree was higher than a teacher with a master's degree at that time!). Greatest decision I could have made.
Get your GED and start looking at the local community colleges for heathcare job training programs. The market for them tends to be cyclical, but they're virtually always in some demand, especially if you're flexible in where you'll live or commute to and what hours you're willing to work (and if you're a single guy, there shouldn't be too many problems with that). The bass player/singer in Slayer is a respiratory therapist, and he used his job doing that to fund his band in their early days and support himself until he could make more money playing.
One little word of advice: stay away from the private trade schools. Stay away from the limited sort of healthcare jobs (like LVN instead of RN, or limited-license x-ray tech instead of radiologic technologist). The jobs pay little, there's little demand for them, and if you go through a private place, they'll be expensive as hell.