Try a M&P Shield, single stack. I can fit it between my hip and seat belt well hidden. Sometimes I have it in the door storage space with a piece of paper in front of it to hide it.
Just wait. Brand new C8s were selling sticker price not long ago, but now you see $11K below the sticker. Soon, used market prices will go lower. Just came back from Ron Fellow's Performance Driving School for Corvette owners, and I learned C8 is a race car (I will not call it a senior's car...
It's due to the negative camber, within factory spec. I am on 3rd set of tires with 48K miles (3rd set is H rated Michelin). Front tires wear inside out start making weird noise, which is time to replace tires around 25K. Rear passenger has more inside wear than driver side.
Ideally the spring should match the struts, paired, but you can just replace the springs. For me, I did the opposite -- I replaced OEM struts and shocks with Bilstein, right after having purchased a GT. It's more firmer, less bouncy.
I made posts 10W-30 and 5W-40 appear too thick, feels sluggish accerlating. 5W-30 seems just right. Someone answered my post "pacebo". I'd say you and I can feel the car better than some folks.
You're young and financially also, so just keep it stock, keep up with maintenance, is my advice. When you're older and financially comfortable, then mod all you want.