In the spirit of this website, helping people learn linux, I present to you the Linux Journey website.
https://linuxjourney.com/
It is a site that gets you through “digestible” bits and pieces at a time. There’s a getting started, teaching you about history and distros, command line functions, text manipulation (regex), advanced text stuff (vim and emacs), user management, permissions, linux processes, package management, devices, file systems, boot, kernel, init, logging, process monitoring and a bunch of other things.
Give it a visit and start your journey. The site is free and powered by an open-source model (where people contribute to the site, although the maintainer is busy for now).
I think this should be pinned for all the visitors to see, wink wink nudge nudge.