Learning how to do body work?

When I was 13 I took a job at a body shop, it started out washing/wet sanding/ buffing cars. After some time the owner asked if I would start taking apart damaged parts on the vehicle and prepping the new parts, prime and wet sand and the pros would pull the dents and frame etc. anyways over time i started watching them and after awhile they started showing me what they were doing, how to do it, etc. and then the boss realized i knew how to do it so he started letting me work on the bigger stuff. That's how I learned. So my opinion to you is to do whatever you think, if you dont have time to take classes then maybe scout around the local body shops and ask if you can work your way up. chances are they may take you in and do what they did with me. GOOD LUCK AND STAY POSITIVE AND MORE IMPORTANTLY HAVE PATIENCE!