With a SCCA membership you get to go their events and participate. Go to their site and make sure you have a vehicle, or have the ability to rent a vehicle to use in their events and almost as important make sure they have some events geographically around you can attend. For example, I hold a certification for a competition SCCA license. But the Challenger cannot race in SCCA. I could rent like a Ford Spec Racer for about $1,500/day and participate or buy a cheap vehicle to use on one of their classes. I may do that next year for kicks. If NASA has events near you, then you could join them and do some HDPE racing with an automatic (Challenger/Charger). Up here for a couple of seasons I chose NASA for events until they did not come to the hometown track Brainerd International any longer. Now, maybe I could travel to one or two events in other states. But instead, I am choosing to just go to the local track and maybe travel a couple of times like I did this year to different states to try other tracks with even different groups who hold similar events.