You can actually find everything you need to work with a Mac on google. Well, not only, but if we are talking directly about searching for some utilities for the Mac, then google has everything. Recently I was looking for convenient programs for recording the Mac screen
https://setapp.com/how-to/how-to-screen-record-on-mac . I found a convenient Capto, which I use often now and can easily send someone a video with visual instructions and guides.