I'm in the same boat only I'm 21, lol but pretty much like dr.d said most of the options for careers are in engineering. It seems the overwhelming majority of college majors are deemed "useless" by many.
I've been wanting to learn more maths and science for a while now since I was decent at them in HS but I started to run into deeper personal problems later in my HS career and peaked my first year at a community college and I ended up dropping out. But I've cleaned up my lifestyle a bit...