As I recall when Apple started selling DRM free music, I was able to buy DRM free copies of my copy protected iTunes tracks for $1 each. But I can’t remember the last time I purchased any new music.
Software like this is piracy, sorry. It’s not legal to rip tracks from streaming services. TuneFab itself is sketchy.
Why not buy the music to put on your iPod? Albums are cheap on Bandcamp or other stores, artists really appreciate getting paid that way, and it’s drm-free.