Plex will only play your ripped CD library. There used to be Tidal integration, but that ended recently: TIDAL integration with Plex ending October 28, 2024 - Announcements - Plex Forum.
As a sidenote:
All of Plex’s core features are free - you can set up a server pointed at your music library, and use the Plex apps/Plexamp to play your music locally or remotely.
