What does Android do? It shows you your app, lets you switch them, and gives you some notifications. An operating system exists to run applications -- there isn't much to learn. Even switching from iOS to Android and back isn't that difficult.
The real issue will be when applications stop supporting your version. I found on iOS that support for older versions dies pretty quick but on Android applications seem to support older versions for a very long time.
The real issue will be when applications stop supporting your version. I found on iOS that support for older versions dies pretty quick but on Android applications seem to support older versions for a very long time.