So I just got this Canon 90D for my birthday and I really want to take those blurry background photos of my dog in the backyard. I keep hearing about prime lenses being better than the kit one I have but I'm kinda lost. I was looking at the 50mm one because it's cheap (I only have about 250 bucks left) but then I read somewhere that on my camera it actually acts like an 80mm? I don't really get how that works or if it's gonna be too zoomed in for my small living room. Is there something else I should be looking at or is that 50mm the right way to go... sorry if this is super basic i literally just opened the box yesterday.