Re: Play store
For most apps, you can use another Android device to access the Play store and install the app you want. Then use something to back-up the app (I use ES File Explorer) so it stores the apk file. Transfer, then just use a file explorer on the Amazon device to install the apk. It doesn't work for everything, and you don't get updates, but it is a lot safer than using other app stores and a lot easier than rooting.