How do I get started?

[Phokaioglaukos]

Ok, I've decided that I want to go racing (I think). I've done the Skip Barber 3-day school and that gets me a SCCA regional license upon payment of various fees and I'm getting that underway. I have a physical exam scheduled and I'll get my doctor to complete the SCCA and PCA forms for me. I plan to rent a spec Miata at Summit Point sometime this fall and do a test day and at least one race, maybe on the same weekend. What more/different should I do?

I'm not sure what class I will want to race in, but I know it won't be in my current Porsche. My car would be in A because it has a lightweight (single mass) flywheel now and I do not want to race a car without a full cage and that would require making the car not very streetable, or saleable. For Porsche I'm thinking F Class, but then I want to keep a mind open to all sorts of alternatives.

Racers, please give me your advice!