Learning resources - michalmonday/supremeDuck GitHub Wiki

Arduino overview
Arduino tutorial series
Starter kit example
Modules/sensors (my way for that is: google -> arduino + sensor name)

Similar projects to this one require "Arduino Leonardo/Arduino Pro Micro" (standard Arduino Uno doesn't support keyboard/mouse simulation). Tutorials related to the bluetooh/android/arduino project:
Arduino - bluetooth tutorial
Arduino/Android - MIT app inventor tutorial