Colemak
amphetype
Once you’ve wrapped your head around the keyboard basics it’s more interesting to try typing in something other than random words.
https://gitlab.com/franksh/amphetype
pip install --user amphetype
Tarmak
Tarmak is a way to transition incrementally to Colemak. Doesn’t come standard with macOS.
Colemak-DH
There’s a slightly more ergonomic typing layout called Colemak-DH
While there’s macOS keyboard layouts, apparently macOS will boot you back to a normal keyboard if you use these for sensitive inputs (which would be a big hassle/problem when typing in a hurry).