After much effort I have installed a new wheel on my mower. I screwed a metal plate to cover the rust hole (and I didn't know metal drill bits were a thing so it took forever to make the holes with normal drill bits), realized the wheel I bought didn't come with wheel bearings, then bought another wheel which I had to space out so it wouldn't make contact with the mower body.
I'm exhausted and I still have to go mow the lawn to test it out.