How do I use nano?

how do I use nano? only closest I got to using it was on MacOS

Just like any other terminal based editor. To get started just type nano and carry on from there (^X means Ctrl+X. Same for other shortcuts in nano). Also see nano - ArchWiki.

Nano is really easy to use.
Meant to use to edit config files.

Here is a cheatsheet from nano software page.

More are located Here