I wouldn't say barebones, but you're right in there is no direct alternative to OneNote I have ever found. It remains the product I haven't been able to directly replace.
A lot of the products people will suggest are very feature rich, just not all the same features as OneNote. For me, the ability to draw on the page freestyle with a stylus is what I love about OneNote. So easy to annotate notes. But linking and plugins are things others have which I love that OneNote lacks.
Logseq has a "whiteboard" feature which is the closest I've seen.
OneNote has been the only tool Ive failed to find a close alternative to, which is a shame because I hate the new simplified versions of OneNote.
I will say though, the linking available on Obsidian and Logseq is fantastic for d&d notes and worth ditching OneNote anyway (for me it was at least).
It will show you popular and upcoming movies/tv shows, and you can integrate with with the arr suite to have users able to request and download the shows.
It's fantastic, especially if you're sharing your media server with others
Don't forward the port in your router, it's not required and is just adding a vulnerable entry point into your network.
You can use a port checker tool to see if the port you are using is open (using the VPN IP). If it's just myanonamouse that's not recognising it, I recommend asking for help on there :)
I've been using Nunti (FOSS, Android only) for a few months now. I love it's adaptive learning feature which does a good job of filtering articles that I don't care about.
And the touch pad works as a trackpad, controlling the mouse. Super useful for launching games and such in desktop mode.