I need help understanding insurance costs depending on age/grades/and so on for a performance car

It depends alot on where you live and what kind of coverage you want or need. If you finance it the bank is going to want full coverage with a low deductible. And should you ever get into a accident, you'll want to have good medical coverage. Any way you look at it, its going to be high. $3500.00 isn't unheard of for young drivers in a sports car.

OK- you are 17 and still learning about this great American dream called "owning a car"- first understand that the insurance companies, like the banks, are going to cover their bottom line so they will never LOSE money- they are basically rip off artists who have got you where they want you- and you WILL play by their rules- in other words, it is gonna cost you a LOT of money- up front, down the line, and if you get a ticket, (as you will) they will jack up your premium faster than you can say "427 Corvette"- sorry, this is the world you live in- driving is a privilege, not a basic human right- that's why you have to go to college to maximize your lifetime income- things are expensive now and they will just get more expensive- and this is the advice from the old man who remembers going to college in my $800 Austin Healey 3000 when gas was 19 cents a gallon and I didn't have to have my car insured: buy a used, inexpensive, more mundane ride to start out- it will be cheaper, up front, repairs, gas, and especially insurance- delay the gratification for a few years until you have finished college, have a good job, and can afford what you desire- you will be an adult, smarter, stronger, and more sure of what you want-