I haven’t tracked my Stinger yet (only has 550 miles on it) but I track my other cars fairly regularly. I have a 2008 Mazdaspeed 3 and a 1995 Acura NSX.
What others have said are pretty true but if this is your first time going, just bring your car and enjoy it. Since you’ll be in the beginner group you probably won’t ever get to the point where you’ll get fast enough and long enough to boil fluids. Though if you do get the chance, step up to DOT 4 fluid. I use ATE Typ 200 because it’s relatively inexpensive and has a high boiling point. I’ve gone over a year without changing the fluid and haven’t had any issues boiling. Keep in mind the brake system is completely closed and pressurized, so it’s unlikely that any water would get into it.
Next for helmets. Yes, get a Snell rated helmet of at least 2010 but preferably 2015. What others have forgotten to say is that it should be a SA rated helmet (not M). DO NOT USE MOTORCYCLE HELMETS!!!
Otherwise just go out there and have fun. Don’t get overly cocky and learn as much as you can. Take it slow, build up confidence at a comfortable pace. Watch your tire pressures closely, especially after each session. You’ll be fine.
After you get a taste for everything, you’ll start learning weak points in the car but keep in mind that
seat time (experience) will always trump performance
mods. The fact that I can run laps around novices in Dodge Hellcats, Mustang 5.0s, Corvette C7Rs and Nissan GTRs in my Mazdaspeed 3 should tell you something.