James
what you need to do is go to
http://skymaps.com/
and down load a skymap for the southern hemisphere
that will give you a great list of stuff to look for with your new dob
start with the Bino objects and then go on to the telescopic objects..and with your dob you can just star hop( go from the nearest bright star to an object of interest) and dont really have to worry about the co-ordinates ...just for the moment, when you are just starting out