Q: Music setting on iPhone 6S 16G

Have you tried this:

Using the new Music app - Apple Support

Here is another source:

http://www.imore.com/how-use-new-music-app-iphone-and-ipad-ultimate-guide

Do you have a question about an specific setting? There are not many choices under Settings > Music. Most of the options are explained on the second article I linked. Alternatively you could do a google search and find other general articles or do a search about a specific topic you have in mind. That's about all the suggestions that come to mind.

Apple Music is a service you can purchase for a monthly fee to deliver music to your device. I don't subscribe and have the switch turned OFF, suggest the same for you. Here are more details about Apple Music

http://www.apple.com/music/