Is there any Profession, Occupation or Trade that interests you? If so, do an online search and find out what the qualifications are.
Junior or Community colleges are usually easy to get into and reasonably priced.
I took correspondece high school (stupid!!, stupid!!, never let anyone do it). I started out at Tech/ Community College. I was scared at first, but it was the first step.
Yknot is right, there are loans and grants available . I remember sitting at my kitchen table paying bills one evening when a few friends stopped by (back when I was still trying to be a Witness). One of them spotted my payment book for my student loan and his eyes bugged out. I then showed him my last paystub. At the time I was making 2-2 and half times more than him, so my investment made sense. I'm not sure how true this is, but the rule I've been told is don't borrow more for your education than you will make in your first year on the job.