I recently set up Sonarr and Radarr on my home server and I'm loving it.
However, I don't get why you would ever use Lidarr. Why would you ever download music using torrents? You can use tools like spotdl and yt-dlp to download songs from YouTube music and Spotify, it's faster and more reliable; I have had some issues finding torrents of music from less-known artists.
To me it seems like it would be much better to have a tool like Lidarr or have support in Jellyseerr to download music from common streaming services.
I've also had issues with Lidarr not downloading anything - For example, I tried downloading music from the artist NF - which I don't think is a particularly niche artist - but Lidarr didn't download anything. What indexers do you use to download music?
I think you basically need a private tracker for lidarr. The arr suite is mostly targeted toward collecting media of a particular quality and will sit on its hands if what it finds doesn't meet that standard
Music is also not well represented in the public indexers, so it's not surprising it doesn't always find what you're looking for