You wont get frame-filling moon shots with the 18-55, but for night sky shots you'l need a tripod.
Frame the sky how you want it, shoot with the aperture wide open, iso100, manual focus a little behind infinity, start of with exposures of around 1 second and go from there, i cant exactly remember what I used last time, but you might find you need much more than that 30 seconds or so? At higher shutterspeeds you'l notice stars trailing slightly as the earth rotates. Remember to use a remote shutter release or the self timer to avoid camera shake. At these settings if the moon is in-shot it will just be en overexposed blob.
To avoid over exposing the moon its best to treat it more like a daytime object as its quite bright, so 1/60th or so might be a good starting point. But i cant see much detail showing at 55mm.
As per my usual post conclusion, i'm sure there's some more knowledgeable people who can assist you further.