I saw your Cobra at LRP last Fri. but was a little busy with some tire issues on the Mini that I was with.
Since I instruct with PDA I can tell you that without a rollbar for your instructor you will have to go it alone on track. It will take you for ever to learn the track unless you have an instructor with you.
I suggest like I did with my friend with the Mini (he also has a Cobra)is to get another car that will allow in car instruction and when you graduate out of the beginner class you can go solo in the Cobra.
Also most Cobras are way too loud for LRP and unless you want to install some Supertrapps on the end of your side pipes they will send you home for being too loud.
Borrow or rent a trailer and sign up for PDA events at either Pocono(track sucks) or Watkins Glen (the best track in the Norteast)
http://www.pdadrivingschool.com/
BTW PDA and NASA Northeast are run by the same people.
RD