Penn Foster has online courses, that with a local shop willing to have you on as an aprentice is a great start. You need to start being a mechanic for some small privateers on the MX circuit. I can tell you now from my own racing experience, I want a pit crew that has been in the game for a while. Not someone fresh out of the box. I have heard from mechanics in the desert racing scene that MMI and Wyotech are a joke as far as being the way to get into the game. But that is just hear-say