You should get something bigger and safer. it's not a matter of if you crash your car but how soon. I would be surprised if you don't have some sort of accident before you are 20. It's just not realistic to think that a kid who loves speed is going to be the safest driver on the road. It takes a few years to develop the maturity and also understand the limits. Plus courts are very tough on young drivers these days.
I would suggest you get a BMW 535i or something like that. It will be fast, but will give you a good learning platform and more safety.
2014 ///M5 Individual
Frozen Grey, Silverstone Full Merino, Piano Black, Exec Pkg, Drivers assistance pkg, LED Package, Bang and Olufsen, 20" Forged wheels