This is going to sound weird but hear me out.
Get a Volvo R of some sort. Not the new R-design because they are shit. Im talking mid 90s to mid 2000s.
They are tanks on wheels, I shit you not. My first car was a 97 850 R wagon. I got it with 136,000 miles on it for like 4,000 US dollars. I then recharged the AC, Paid 800 for a new exhaust, new tires and alignment.
I drove this car hard and fast every single day for 4 years. I was 15 when I got it when I only had a learners permit.
I crashed into curbs, went off the road twice, got T-boned (not my fault), hit a few snow banks, and always walked away ok. The car had the nicest leather seats ive sat in to date, comfort wise over a long trip.
It is your first car. It will get some dents and scraps most likely. If you want the supra and can afford it go ahead. But think about taxes, insurance, registration. That adds up quick.
You have all you life to buy cars and it will suck if you ever have to take a step back in the evolution. My friend in high school had a badass 3000 vr-4 that he put over 6k into, then he crashed it, and could only afford a honda civic
My cars so far, Volvo 850 R wagon - 07 WRX - 14 BRZ.
Save you funds. If you can afford a supra or a BRZ now, in three years why not buy a M3? If I had the funds I would have bought an M3.
I believe you have already made up your mind though, being 16 and head strong you own't listen to us slightly older guys, at least I would not have
Edit = I passed my volvo on to my younger brother when it had 199,460 miles on it, and I realized that the odometer had broken. He drove it for another 2 years before my uncle took it as a parts car