App to Organize and Listen?

I have about a thousand audiobooks—two thousand once I import my family’s primary Audible account using openaudible, but I’d like to have a solution to this first--Currently, I keep them in a Dropbox file, and then import into Bookplayer to listen on my iPhone.

Is there an app that can attach metadata to these, and organize them? I’d be happy with the very basics—Title, length, read/unread-- Before I started backing up Audible, I had read/unread folders, but that was just me moving files around. For ebooks I use Calibre and BookFusion. I’ve heard of using Plex/Prologue, but I only have access to my laptop, which doesn’t make running a server feasible.

I have a MacBook running OS 12.7 Monterey (and can’t update further) and have an iPhone 15.