Thank you. You are absolutely right and it was right there in front of me!

Could you set up a Cloudflare tunnel and make sure the security rules are tight enough to keep others out?

Can you export playlists from Navidrome? I’m running it and can’t see a way of doing that. (The workaround I’m using is building playlists in Synology Audio Station and then setting up Navidrome to import them. If you know a better way of doing this I’d be interested.)

Have you been listening to and analysing the lyrics of mid-1970s Pink Floyd? If not then that could be your next move.

Check out Memos. It does most of what you want. There’s an app, MoeMemos as well. I’ve used Memos as my journal for a couple of years now. (There’s also a sync with Obsidian if you use that.)