Joel, you find a lot of good information on NARRA's website. I've run with NARRA for the last 3 years but havent't particpated in the school. I'm sure others here will provide you their experiences with the beginner instruction. NARRA evolved from the original Viper Days w/Skip Thomas. Skip had a great beginner program so hopefully NARRA kept it going good. Since your at a NARRA event the instructors will be familar or owners of high HP cars. They know how they handle, accelerate and brake, and will help you more than say an instructor that runs Miata's, BMW's etc.
Not sure if they have their Tech form on-line. Basically they are looking at safety, is your car safe for you as well as not a hazard for others on the track. Brake pad thickness and fluid level/color, wheel and tire condition, engine (fluids, leaks), body and appearnace (nothing loose), seat belts, helmet, etc Take a look at this checklist, it's a good reference
http://speedventures.com/events/tech.pdf
As far as equipment, a safe car, a current model "car" helmet and long sleeve shirt and pants. You have a convertible, check NARRRA to see if they have a rollbar requirement. Here's another link to speedventures site, open the "track checklist" tab on the left side, good reference of things you may need or want to bring,
http://speedventures.com/
Good luck and have fun, you"ll have a great time that can become very addicting! Mike