Importing iTunes music library to Apple Music on iMac

Simple Import of iTunes Music into (Apple) Music on My Computer

I am rather late coming to MacOS Tahoe - my previous operating system was Catalina. I have bought a new iMac M4 and I want to import all my iTunes music (with playlists, album art, etc) into Apple Music. (I am not looking for any on-line Apple Music features, just a consolidated music library on my iMac). I have a full backup of my iTunes music:

and nothing in my Apple Music.

How do I import all my iTunes stuff into Apple Music?