Packages for dev a MonoGame(XNA) in Xamarin on Windows -> Projecttype ANDROID MonoGame

base = untouched 7/8.x Windows system

a) Inst. XAMARIN STUDIO for Windows :-)
b) download "MonoGame" AddIn for Xamarin on CODEPLEX - Use the ADDIN Manager of XAMARIN to add it...
c) download the Android SDK atd-bundle zip Archive and uncompress it - use the inner SDK MANAGER.exe to install the packages