Start out simple and stick with a basic BitTorrent client. Figure out where you want to download from and get a torrent client configured. I use an ISP that frowns upon piracy so here’s a quick overview:

1. Look for public torrent sites. I’m out of this game so I don’t have any suggestions.
2. Research private torrent trackers. I don’t think I can provide any help with this, but there are other corners of Lemmy who can.
3. Find a VPN. Everyone has thoughts on this and Proton VPN is the one I’m currently using.
4. Pick a torrent client. I’d recommend qBittorrent myself.
5. Configure your VPN to include your BT traffic.

If/when you want to try Lidarr, you’ll be much better off knowing the basics of BitTorrent because *arr software is confusing in its own regard. Lidarr is just a tool to organize your music library folders and also automatically queue downloads. It is not a requirement to enjoy downloading music.

Usenet and soulseek are other alternatives.