I may write a tutorial later but for now all I have time for is a quick run down.
You will need adb on your computer, the RSE and your computer to be on the same hotspot / wifi network. Also you will need an apk file for whatever launcher I used nova launcher from here. Nova Launcher 5.5.4 (noarch) (Android 4.1+) APK Download by TeslaCoil Software - APKMirror
On your computer you will want to type “adb connect <IP_OF_RSE_TABLET>” then “adb devices”. Once you confirm the connection you type “adb install <apk_path>” afterwards if you hit the home button on the rse display there should be two options, hit nova launcher then always and from there you can install or access whatever you need.