The first time you launch the iOS Music app you should see a message asking if you want to subscribe to Apple Music. If you've previously dismissed the prompt, tap the For You tab at the bottom of the screen to sign up for the streaming service. iTunes users can find the same For You tab near the top of the iTunes window.
Selecting Favorite Artists and Genres
After you've followed the initial subscription process, the first thing you'll want to do is select the music genres you're interested in.
You'll be presented with a series of bubbles on the screen representing different genres. Tap or click the ones you like and double-tap the ones you love. You can also press and hold on a genre if you don't like it. Tap the reset button to start again if you make a mistake.
Once you've finished, you'll be asked to perform the same selection for your favorite artists.
It's worth noting that the longer you spend choosing your favorites on these setup screens, the better Apple Music will be at personalizing the service for you as soon as you start using it. You won't get access to the bubble screens again, so if you want instant and accurate suggestions, it may be worth taking your time interacting with them.
But don't get too hung up on your selection –- Apple continues to tailor the service to your tastes as you continue to use it. For more information, see check out How to Customize Apple Music With Loves and Dislikes.