As I am a humble dobber I don't really know much about your type of scope BUT I would hazard a guess that if you are not seeing the rings of Saturn you are not looking at it!!
My advice would be not to do anything yet except spend heaps of time at the scope, learn the sky, tweek up the alignment and tracking and generally get to know your instrument. A 4" scope should let you see the planets, moon, sun (with filter), star clusters, binaries and some other DSOs.
The other advice is to get along to your local astro societies' viewing night (there is a group at Sutherland
http://www.sasi.net.au/ ) as there will be plenty of help available there.
Even if its a bit smaller than you would like I would say that scope is a great one to start off with and may even end up as your little travel scope when aperture fever bites in future.
Take your time and enjoy.