School
You have been given excellent advice from all these guys. Now for my 2 cents worth. The days of the "backyard" mechanic are over. Every thing is computerized today, especially cars. If two people apply for a job as an Auto Tech, and one is self taught and one has a Degree; who do you think will get the job? My advice is simple. Do what you hate for a while, to do what you love for a life time. If you do a job that you love you will never work a day in your life. Thats is a old adage, but very true. Good luck.