I'm gonna throw in my 0.2 cents and cast a second vote suggesting you check out http://www.pct.edu. I'm in their auto program and it really is top notch.
It's not hard at all to get in. You pretty much just sign up and take a placement test if you don't have your English and math requirements completed yet.
The guy is mad soft spoken. PCT was one of my choices when I first start looking at schools. It would still be one of the choices if I decide I want to do some welding.
Take it from this Gen-Xer (me): Get a degree. In ANYTHING. Really. ASAP. I've had a lot of jobs - good ones - and many simply asked "Do you have a college degree? Y/N", or "What is your LEVEL of education?" 99% of middle-class employers don't care what field you studied or what your GPA was. If you want to take it to the next level - $100k+, then yes, those things start to matter.
So at the very least, get a bachelor's in ANYTHING, as fast as you can; run through college like a bull in a china shop. When you really (really) discover what you want to do, pursue it at the graduate level.
As for pursuing what I'd call Motorhead Science, rather than go the full-blown trade school route, look into engineering. You'll learn enough metallurgy and creative processes to satisfy the fabricator in you, at the same time you're earning a more marketable degree with broader appeal in the job market.
I say this all from first-hand experience. I got a great corporate-level automotive R&D job with a totally unrelated degree... and two ASE's. Guess what they cared about: "A college degree and two ASE certifications? Super!"