I’m a huge proponent of the command line, but you often spend more time learning tools and configuring your environment than getting work done.
I’d instead recommend you start with learning basic system administration for Linux. User management and permissions on https://linuxjourney.com/ or TLCL would be a good place to start. Of course there’s a good chance your desktop environment has ways of configuring users and permissions, too.
Ublock origin has a very powerful URL filtering system, e.g. https://beehaw.org/c/gaming$document
blocks you from accessing the gaming community on beehaw, but doesn’t stop you from accessing https://beehaw.org or other communities on the site.
This is a whataboutist counterpoint at best. Universities and their researchers are not a monolith.