Mac and BN Apex

Braille on Apple Products
Hello, I hope someone has been using Braille on a Mac longer than I have and can provide some insight. I have used Braille on iOS and all its quirky habits for awhile, so I knew a bit what to expect. How do you interact and stop interacting? How do you access some system menus like the top bar, dock, window and app switchers? Do you have to set up custom commands for those? Do people use their displays with Perkins keyboards in conjunction with the Mac keyboard or trackpad? I am trying to train my hands on what to do when, since I never fooled around with drivers and such on Windows. So this learning experience for me is cool! Thanks, Chelsea