Self host your own RSS feed aggregator to pool from the sources of information that you prefer
Use the provided docker-compose configuration file in order to setup monitoring for your homelab server
Gitea is a tiny alternative to GitHub written in Go, I'll show you how to use it.
Whoogle is a browser that you can spin up in a docker container to run from your own on-prem hardware.
Use Jellyfin to serve your media, essentially creating your own cloud.
Use File-Browser software to self host and manage files on headless Linux servers. Follow the link in the title to learn more.