You shouldn't worry about the bus's. It's so easy. At
http://www.gvb.nl/english/default.asp ...use the Central Station area map to find the stop for your lines. Open during the day across the street from Centraal Station is a two story looking white, red tile roofed building that is the GVB office where you can buy an uurskaart that allows you to go anywhere in Amsterdam 24 hours a day by only flashing the pass- couldn't be easier. Have the nightbus driver show you the stop nearest De Lairessestraat which is an easy walk to your hotel.