Gordo, welcome to the sport. Don’t worry about age. If your eyes are still good and you can get out of the kart, your good. Learning curve can be steep for tag, you may spend some time catching up to the kart. As for parts, whoever is local where you are. I’m a firm believer in this, the extra pennies you may save are meaningless when your really in need of help to get back on the track raceday. Even if that means he’ll go where you could go direct. The guy helping will know what to do, he’s been there. Good luck and have fun! I still am.