Spacers for my setup recommendations

I’m on stock ride height and just bought some r888r 295/30 in the rear and 265/35 in the front. I initially was going to go with 15mm in the rear and 12mm in the front but I’m worried about them rubbing.

I’ve read that I should add some negative camber like 2 degrees if I do 15mm in the back.

What’s your guys thoughts? I’m pretty new to this so sorry if I sound dumb lol.