Sonarr and radarr manage downloads for TV and movies in a nice way for Usenet and actually torrents as well. You can set up quality profiles and choose which shows and movies you want to download and they will grab torrents/nzbs that meet your preferences, automatically start them in your torrent app or Usenet downloader, and then organize them in folders with appropriate metadata for Kodi/Plex when the downloads complete. They automate the process very nicely.
Edit, I’m a Usenet guy if that wasn’t already clear lol