LineageOS has the biggest library for supported devices afaik, and if you have a supported device you can try PostmarketOS which is Gnu/Linux based without any Android base, again afaik.

I just use RSS feeds for everything that interests me. some of them are hackernews, serveTheHome and opensource.com, but there are plenty more. RSS is so underated imo.

back in my days people used forums and read man pages

Try YiffOS