I only need to send sign up and password reset emails for Jellyfin, I don’t need to receive any emails back.

Grist is a selfhostable alternative to Airtable

https://www.getgrist.com/blog/grist-v-airtable/

You can selfhost Standard Notes. The notes are encrypted client side before they reach the server.

I’ve been using OwnTracks for a while and it works really well.

You can use Subtify with Navidrome to import your playlists. It matches your Spotify playlists with your local music.

No, this is a bookmark software. You can probably use JDownloader for this to scrape a URL for downloadable content, depending on how the site you use is formatted.

A small whiteboard on the fridge perhaps?

If you need to throw in the towel on email self-hosting, don’t be ashamed. Mail servers are one of the more difficult projects to run. If you do end up outsourcing this, I recommend SendGrid, it’s reliable and free.

Sorting a music library is a very manual process. Your best bet is MusicBrainz Picard to clean up your metadata then use something like Lidarr and Lidarr Extended to maintain and continue to add to your library.

I’ve started using Hoarder and am enjoying it. I really like the page caching and automatic AI tagging so that I don’t have to.

I have run Jellyfin for about 3 years. Plex has a lot of community support and praise so I spun up a test instance. Unfortunately for Jellyfin, Plex is much most reliable for me in pretty much every way. I would love for Jellyfin to keep improving but the switch to Plex just made the media experience so much nicer.

And a lesson to all as to why backups are essential.

There is with Purelymail. And it’s only $10/year.

Have you tried using Calibre with Readarr? You use Readarr and the request tool then you can tell Readarr to use Calibre to manipulate the library. I find that this does a fantastic job of sorting out all of my ebooks with all their editions and naming conventions.