yup, basically what aaron said.
alternatively, my strategy was to stick my head in the sand and remap my keys to almost exactly what i had before, mac conventions be damned. :P [https://snarfed.org/2013-03-02_mac_os_x#Keyboard_and_mouse](https://snarfed.org/2013-03-02_mac_os_x#Keyboard_and_mouse)
Oh this is wonderful! Tbh, I’m not a big customizer, but there are a couple of tips here I’m grabbing with wild abandon (remapping Caps Lock to Ctrl is crucial!). I haven’t quite worked out the difference between brew install and brew cask install, but the latter gave me GUI emacs so I’m happy :P
I have bad news to report: I started using Sublime Text yesterday and absolutely love it.