Come to the next F100 race, walk the pits, introduce yourself, etc. if you get to the pits, just ask for a guy named “Stu”, everyone will know who he is. He is a good resource and will get you familiar. He does race as well, so he might be busy tuning and fixing or racing, but if you get there early enough he can introduce you to several of the racers and we can all answer your questions. It’s a great atmosphere and tons of fun.
The biggest problem you might have is bring competitive with 3 brothers sitting on each other’s laps while trying to race. Iirc, Stu might have some rental karts available too.