There should be an app on your phone called the Google play store or "Play Store". Once you open the app it will take you to the store, then you just search for what your looking for using that handy dandy search bar. Once you have found it, you will have to connect a credit/debit card or a Google play store card (They can be found at Walmart, Lowe's, almost any big retailer) or skip connecting (if you find a free app, for music and books you have to connect whether what you're wanting is free or not.
Hope I helped.
