You’re even still free to just go buy the CD and rip it, as odd as it sounds.
What happens with your iTunes music if your apple account would get locked? Sadly the only option nowadays would be purchasing hard discs, and hope theres no protection on the disk as you are not allowed to break it
ITunes has been DRM free for over a decade?
Nothing, you can download all the music DRM free first. You do own what you bought, at least from iTunes you do.