It is definitely worth the time it takes to learn text manipulation with the ubiquitous Vi(m) command line text editor. There is a visual version, but we're going to focus on the command line interpreter version. If you only know how to open a file and enter text, edit some text, and especially how to save edited files and exit the program you will be much better off for it.
Vim is readily available in nearly all modern Linux (or BSD) distributions at the terminal emulator shell command prompt. Once you've defined Vim as your default editor for your user shell, then you can navigate builtin utilities like $ man
etc. using familiar Vim key bindings. We'll highlight how to do that with bash and zsh, now distributed by Apple on the Mac since Catalina.
# ~/.bashrc (or alternatively) ~/.bash_profile