Welcome to the madness!
Just a couple ideas...
If you can hang with anyone local they will gladly mentor you, and thats huge. Even better if they have your kind of car.
That said, the biggest issues are often the silliest, like the paperwork, lic. items, physical, and so on. So read up on the website, and feel free to call hQ in Kansas early to get things lined up and resolved.
Secondly, the car needs to pass tech. It's mostly a safety exam, not really a rules thing. SCCA is really an "honor society" of sorts. The officials help to resolve conflicts, but rules infractions are most often left to the competitors to police themselves, protesting when they have to. Unless your car has grevious issues, or you are super fast right out of the box, absolute legality won't be your first concern.
Car reliability and safety are. So make sure the car has all the "consumables" freshened. Thinks like bearings, brake pads and rotors, and so on. Nut and bolt the entire car to check for proper tightness of fasteners. Check to be sure the belts and nets and your suit and helmet meet date requirements.
If you can, get the car teched before the first school. Some regions do this preseason. Check your regions website for info.
Finally, read the GCR, concetrating of the race procedures and the IT sections.
And most of all, have fun!!!!
What car and class? Where will you race?