Check whether the Android TV box supports Google TV launcher installation
Update the device to the latest firmware
Enable developer options
Allow installation from unknown sources
Install a Google TV-compatible launcher APK
Install the Google app and Google Play services if needed
Set the Google TV launcher as the default home app
Remove or disable the stock launcher if possible
Sign in with your Google account
Install streaming apps from the Play Store
Use a remote app or compatible remote if the interface changes
Factory reset the box if launcher changes cause issues
Root the device only if required and if you understand the risks
Use a custom ROM only if one is available for your exact model
Verify that the box hardware supports DRM and streaming app requirements
Restart the device after each major change