As for Linux stuff grab something small and low powered (raspberry pi etc) and start installing some distros! The possibilities are really endless. Setup a network wide ad blocker, start your own IPTV server, you can setup a networked radio receiver, WireGuard for VPNs. Immerse yourself and figure out what you find interesting.
It’s a reference from an old comic
https://blogs.warwick.ac.uk/images/steverumsby/2004/09/20/1b2.JPG
As for Linux stuff grab something small and low powered (raspberry pi etc) and start installing some distros! The possibilities are really endless. Setup a network wide ad blocker, start your own IPTV server, you can setup a networked radio receiver, WireGuard for VPNs. Immerse yourself and figure out what you find interesting.