What to buy for my first car?

Anything "sporty" is going to cost a fortune to insure for a new driver with their first car. Seriously.

A Nissan 370Z? I suggest you check out the insurance cost BEFORE you make any kind of committment to buy one of those. Be sitting down when you see the numbers. Then, when your mouth closes, start looking at small cars with small engines that just about get to the speed limit. Same as most other first time drivers get. Because of the insurance costs.

And don't even think about putting everything in a parent's name to cut costs. That's insurance fraud and the insurance companies are wise to it.

its better to go for something like Toyota 86 as your first car. 370z is fun but after the intial honeymoon period when you start to bother about gas mileage , high insurance and service cost it wont fit in the bill.

The insurance cost for a Nissan Z car will be super high for a young driver. Why? Because young drivers wreck such cars more often than any other type.

Mazda Miata

I hope you are trolling. Get something like a Scion tc and stay away from 300 + hp rwd cars, they are not for novices.

Nissan 370Z, young male driver, first car? Utterly ridiculous. You won't be able to afford the insurance, it's a terrible snow country vehicle, and you won't be able to behave yourself, so you're likely to end up with a suspended license and a wrecked car. Get something like a Subaru Outback instead. AWD, excellent in snow, fast enough to break any speed limit, and more affordable insurance.

Buy the vehicle you can afford to operate and insure. Call for an insurance quote on the Z. It will give you a wake up call.