Install Google Play Easily on the Amazon Fire Tablets
goodereader.com
goodereader.com
The blog links to this thread itself, but you can skip the middleman and go directly the source itself: https://forum.xda-developers.com/hd8-hd10/development/offici...
The other thing you can do to improve your Kindle Fire experience is install a custom launcher to replace Amazon's terrible UI.
Once you replace the launcher and add play store apps, the Amazon tablets actually become fairly useful for light tasks such as reading eBooks and watching media.