Adam, I dont think your too old but dont quote me on that. They get expensive really quick, like anything else plus you need ot tow it etc and of course for the racing you need to travel to the races. I think most of them are run along with the CORR series. I know they run them by my house at the Lake elsinore MX track. Good luck on whatever you decide, but iif it were me I owuld concentrate on your truck or find a baja cheap that you can play in and tow out easily.
Jeremy