privsecfoss
XMPP / Jabber. Because: Open Source, organization behind it, old and battle tested, possible to selfhost, lots of clients on all platforms, end-to-end encryption.
Duplicati to Hetzner storage. Working on replacing duplaicati with Borg. Because mono.
Newsboat
Looks nice!
My Pentium 120 MhZ playing Duke Nukem, Quake, Diablo, Red Alert. All my friends had 133 MhZ so was the underdog at LAN meetups 🙂
+1 light and fast
Try FSF and FSFE for free software recommendations. And searching for specific software categories and adding "open source". Generally works fine for me. Also, a good site to find FOSS alternatives to software is: https://alternativeto.net/
Solid recommendations. I love OpenMW and possibly GZdoom with mods and maps even more. For more on Doom see moddb.com for mods, maps for Doom II etc. Be warned - when you start it's hard to stop again 🙂
Instead of going to blogs, YouTube, podcast etc. you subscribe to them and feetch news from them via RSS in a web or local client. IMHO the way things should work 🙂
I think Nextcloud is an easy option. Lots of dedicated FOSS WebDav servers out there. For CardDav and CalDav (Contacts and calendar) I rembember that Radicale is recommended: https://radicale.org/v3.html