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.
Logseq has genuinely made me a less stupid person. It’s confusing to learn, but the ceiling for articulating and organising your thoughts and knowledge base is insanely high. Other apps kind of feel like I’m fighting the limitations of my tools in order to organise a mental library of where to find information.