Learning some basics of vi(m) and using some plugins to enhance it can improve your productivity compared to Nano on the long term (e.g. syntax highlighting with color palettes, linter, tmux support, and what not).
That said, I prefer Sublime/Vim (Sublime also has these plugins), but Nano is a decent alternative and resembles the first text editor I ever used. Sublime is lightning fast for me, but it isn't open source.
To break the habit of firing up Nano I symlinked it from /usr/local/bin/nano to /usr/bin/vim. If you use Vim regularly, the shortcuts will stick in your head whereas if you resort to Nano you won't memorise them for long. If I ever still require Nano then I can execute it by executing /usr/bin/nano
For people on a Mac, I can recommend the app CheatSheet [1] available in Homebrew. If you're lost in an application holding Command (⌘) for a few sec will represent you with a cheatsheet of shortcuts. It won't work with CLI apps though.
That said, I prefer Sublime/Vim (Sublime also has these plugins), but Nano is a decent alternative and resembles the first text editor I ever used. Sublime is lightning fast for me, but it isn't open source.
To break the habit of firing up Nano I symlinked it from /usr/local/bin/nano to /usr/bin/vim. If you use Vim regularly, the shortcuts will stick in your head whereas if you resort to Nano you won't memorise them for long. If I ever still require Nano then I can execute it by executing /usr/bin/nano
For people on a Mac, I can recommend the app CheatSheet [1] available in Homebrew. If you're lost in an application holding Command (⌘) for a few sec will represent you with a cheatsheet of shortcuts. It won't work with CLI apps though.
[1] https://www.cheatsheetapp.com/CheatSheet/