Earlier quoted context omitted.
See https://news.ycombinator.com/item?id=47440869
YouTube Music could work for you.
So far, looks very simple and easy to use. I will definitely give a try. Thanks!
EDIT: right off the bat, it's included all my likes from YT... which is very annoying. Those are videos. Hopefully that can be changed.
EDIT2: I didn't include my Spotify liked songs... it was coincidicence that I listened to something in YT and Spotify.