Welcome to Malifaux!
Governor's Decree is for the official Wyrd events which contain harder points than a normal event. For non-official, more casual rules you should consult the Gaining Ground pack. This can be found just beside the Governor's Decree at Malifaux.com download section so I wonder how you missed it.
As for a demo guide, I'm sure one of my fellow Henchman has something for you and will help you shortly.