I don’t use pocket like services myself but when I’m looking for alternatives I like to start at alternativeto.net. It’s a great tool for questions like this.

Here’s a query I did for Pocket for you: https://alternativeto.net/software/pocket/

Navidrome doesn’t have music suggestions, which is what the OP is after.

Check out audiobookshelf, they’re picking up the slack from Plex; dedicated for audiobooks and podcasts.

I’ve been using navidrome since the start of the year. It was my first instance of self hosting my music and my main focus was to have a dedicated project for it and to not use something like Plex, Jellyfin, etc. I’ve been liking it so far, it’s simple and just hosts and streams music. Doesn’t have any client side apps or any tagging or smart algorithmic playlists, which is fine by me. Plenty of iOS and Android client side apps with varying features that can download. Worth checking out!