How can I get into the industry without school?

Im 18 and ever since I was little I’ve loved cars and i may be going to community college to learn how to work on vehicles, and I’ve met with my advisor and tbh it doesnt sound like something I really want to do anymore. I still want to work on cars but I don’t want to spend the next 2 years and however much money to learn something I couldve figured out and handled myself. I understand it’s a stretch or maybe even a little unrealistic but I want to be wealthy while Im young and I also want to do something with my passion, and i know that community college wouldn’t necessarily stop that but like I said if I can find a way I want to do it. My plan is to work at a oil change shop or wherever I can get experience working on vehicles and work on my own car on the side and eventually get enough experience and money to become a mobile mechanic and eventually own my own shop but I was just wondering if there were any other ways or just advice in general I could get, just learning cars any jobs or any ways I can get experience