SpotDL will download youtube music equivalents to Spotify tracks in 128kbps or 256kbps if you have YT premium

Spotify Import for Jellyfin will import your Spotify playlists to Jellyfin (provided the songs already exist in your Jellyfin server)

Lidarr allows you to import Spotify playlists. (I do not endorse piracy, use Lidarr in ways legal to your local laws and regulations ;p )