I have an Insinkerator garbage disposal that has died. I was looking to replace it with another of the same brand since I figured the holes of the new one would line up with the last one. Then my mom said that she is willing to give us a KitchenAid disposal from the store where she sells them. Is installing a garbage disposal easy to do? I am an absolute beginner when it comes to plumbing other than changing toilets and shower heads. Also am I going to run into any issues because of switching brands? My first thought is that the holes may not line up correctly which I guess might be an easy fix.

Thanks for your help.