How to buy Apple music
How to get my music from Apple Music.
iPhone 11 Pro Max, iOS 13
Question marked as
How to join: Join Apple Music on your iPhone, iPad, iPod touch, Mac, or PC - Apple Support
How to download or add music to your library (also how to purchase music through the iTunes Store without needing an Apple Music subscription): Add and download music from Apple Music or buy music from the iTunes Store - Apple Support