Jennifer,
To your earlier questions. Bringing a $30K car out on the track should concern you. Honestly the number on the car cost really comes down to what you can financially absorb. Don't think that only D2D racers need be concerned with balling up cars. Cars break, yours or the one in front of you that just dropped oil/coolant/parts on the track, you make a mistake, stuff happens. You can hit a wall. The odds are fairly low. If you listen to your instructor, keep your speeds down, a cool head, and a little bit of luck. You should be ok.
That said, I took my $30K, at the time, Z06 on track. Some people said it was bad idea others said heck yeah enjoy it. Don't worry what others think about that part. It's your decision. For me having a Z06 to putt down the highway was boring. Autocross was fun but never really what I wanted the Z06 for. At the time this track insurance you see offered now didn't exist. So I ran the risk of writing off my car. I have put it in a tire wall at very low speed. Scratched it up good. I swear the front wheel hit something slippery as my steering just stopped grip. It could also have been a mental error. It really doesn't matter when it comes to the car. It still got beat up. Luckily I didn't. The downside is needing to paint the whole front of the car and a couple of parts needed. The upside is I said the heck with that and now will use it mainly as a track car. It won't be pretty. I got over it. Saves me a lot of time waxing...
Which brings me to another point. You may be young and in good shape. Maybe not. If you hit something hard. It will still hurt, a lot, at best... My little slide into the tire wall mainly hurt my pride and pissed me off. Didn't physically hurt at all. If I would have hit in several other places I would have been going a lot faster and it would have been much, much worse. There are several members in this club who have had bad offs and hit hard. As there are in many other clubs and groups. Don't be fooled that it can't happen to you.
It is a change from autocross. I enjoy it and prefer to do that for now. It isn't better, it's different. Do both. Just understand your risk for damage increases significantly on track. The more you do it and the more you push to get faster. The risk continues to rise. Just be realistic. All that said I love driving VIR and Road Atlanta. Now I'm off to Sebring and next spring Watkins Glen. I'm checking off my bucket list items since I'm old...
... and as a plug for the club. Yes THSCC runs one of the better, safer, and more focused programs. You'll enjoy it.
Graham