The above basics apply. If you can find someone who’s invested in a Hunter alignment machine, you’ll likely find a good shop. They are expensive and what BMW uses. Next track day, ask others from the Orlando area. Bound to be race shops a plenty!
I’m running a square 275/35-18 setup and kept her all spec with -2.5 degree camber all the way around. If you don’t mind having more car control, start playing with the toe as mentioned above. The cars are setup inherently with some understeer = not ideal. It definitely a personal thing. But that’s where I started.