Hi Gill@11,
Thanks for your question. If you are an Apple Music member, you can share your playlists, regardless of where the music came from. Take a look at the resource below. I've highlighted the key information, but you can click on the link for complete details.
The Library tab makes it easy to navigate all of your music, wherever it comes from—from the iTunes Store, from a rare import CD, or from your Apple Music membership. Every time that you add a song, album, or playlist, we keep it at the top of Library in Recently Added. Tap Edit in the upper-right corner to change which view options (Playlists, Artists, Albums, Songs, Video, Genres, Complications, Composers, and Downloaded Music) you see.
You can create playlists to listen to or share with friends. From the Library tab, tap Playlists, then New Playlist. Fill in details for your playlist, such as the title and description, then add music. If you like, you can also add an image. When you're happy with your playlist, tap Done in the upper-right corner.
If you don't see Playlists under Library, tap Edit in the upper-right corner, then tap Playlists to turn it on. Tap Done to return to Library.
To share a song, press and hold the song, then tap Share Song 
. To share an album or playlist, tap 
, then Share Album or Playlist . You can share music to Facebook or Twitter, send using Mail or Messages, or copy the link.
With iOS 10 or later, people you share music with in Messages can listen to or preview songs directly in the Messages app. If they have an Apple Music membership, they can play the full song. If they don’t have an Apple Music membership, they can listen to the iTunes Store preview for the item and then go to the iTunes Store to purchase it.
Enjoy!
