Hello sscolmery,
Thanks for that info and choosing the Apple Support Communities. I know how important using Apple Music for music on your iPhone is to you! If I understand correctly, you want to take the music that is on your iPhone already, and add it to your iCloud Music Library. Good news is this is very easy with Apple Music, and here is how you can do this:
Add music from your own collection to your Apple Music library
Cheers!