I will help. I have Z10, update your phone to OS 10.2.1 first. Click this link http://www13.zippyshare.com/v/94498177/file.html and download then install. If you want to find out how to install more apps that aren't on BlackBerry World then go on YouTube a search, how to install Android APK apps on BlackBerry 10.2.1. This will tell you.
Are you on OS 10.2.1 (the latest OS). If you are on your phone click on this link http://www13.zippyshare.com/v/94498177/file.html Select "download now" and wait for it to download. Then in your browser select the little icon in the bottom right and you will see downloads. Tap on the file you just downloaded and select install. Did this help? If you need more help click on this and watch the first few videos http://m.youtube.com/watch?v=yd6GTfLQ2uE it will tell you how to download and install apk files.