For a car that is primarily street driven with occasional spirited driving, I'd recommend a staggered setup. Square is usually preferred more for track/performance driving where tires get worn out faster, and thus the ability to rotate them front-to-rear is important to get the most life out of them. Street driving wears the tires relatively slowly and in this case you'd benefit more from the additional rear traction and better aesthetics of a staggered setup.
I recommend 18x9" ET30 with 235/40-18 front tires and 18x10" ET33 with 265/35-18 tires as a starting point for sizing. We have a fitment guide you can use for reference when shopping for wheels to get an idea of what widths and offsets will work, and when you'll start needing additional modifications such as camber plates or rolled fenders in order to fit some of the more aggressive sizes:
https://support.apexraceparts.com/hc...s/360001673834
--Dylan