Play Music comes pre-installed from the Play Store.
From the home screen, tap the All Apps icon.
Scroll to and tap Play Music.
Tap to select a Google account.
Note: To add a new account, tap ADD ACCOUNT and follow the prompts.
To Skips this step, tap SKIP.
To try out Google Play Music All Access, tap GET STARTED. Otherwise tap USE STANDARD.
For the Other ways to play message, tap DONE.
Tap Got it.
Google Play Music is now set up and ready to use.