Just an update
You can easily install apps by downloading them on your computer, copying them to a USB and install using the built in file manager.
Download the APK's from: https://www.apkmirror.com/
A couple of recommendations.
Install aptoide for android tv, that will help you install other apps easily: https://m.aptoide.com/installer-aptoide-tv?lang=en
Also install Terrarium TV which will take care of all your TV shows/movie needs: https://www.apkmirror.com/apk/terrarium-tv/
Another recommendation.. Don't install too many apps as the box only has 1gb ram. You should install only what you will actually use and uninstall the rest.
Alot of apps actually don't very well with the remote.