What vehicles am I restricted to as a novice?
You can race any vehicle you like as a novice. Other rally organizations limit new rally drivers with rules like keeping them out of turbocharged cars, but NASA Rally Sport does not.
We occasionally get questions about "What are your limits for novices? I read the rules and I didn't find anything." and the reason that looking in the rules won't reveal the answer is we don't have any limitations in the rules.