I would look up your car and a BRZ on an online place (I use Tire Rack, I believe Discount tire is a forum sponsor) to see specs for stock rims.
Rim diameter and width
Save up for a better set with the proper bolt pattern at least.
Once you start adding mod on top of mod, you’ll likely regret it. Imagine how happy you are at first with a deal on some used wheels, but then how pissed you’ll be when you realize you need additional parts to make them work... hub rings, hub adapters, spacers, longer bolts. What if they don’t clear the front calipers cause you plan on adding a big brake kit? Then of course rolling fenders and shaving brackets. Where is the $$$ for all that. ?
Anyways, do some basic research man or you’ll go broke soon and lose your girlfriend in the process.