Hi Christiano
Firstly
! I have only been using this site for a couple of weeks and it is excellent.
Jupiter is fantastic I agree and nothing beats the buzz of finding and seeing it for yourself with your own gear. It has 4 easily visible moons that you can easily see as star-like dots beside the planet (even with a steady pair of binoculars). They are all in a line in the same direction as those dark bands you could see on Jupiter itself. As the night progresses, the moons vary in their position, sometimes a little, sometimes a lot. You could see 3 moons out 1 side, 1 out the other at 7pm , then by 9pm see 2 on either side and so on, as they rotate around the planet.
If you have a computer you could download the free program Stellarium, which will predict for you what things are visible for you every night of the year. It will also show you where the the moons of Jupiter are all the time.
The other thing I'd suggest is get a planisphere (wheel with sky map on it that you can learn the heavenly layout at different times of year) and get the book "Astronomy 2009" from any bookshop, which tells you bits and pieces about what to expect and where to find it. It is about $20, planisphere, probably less. A new edition is put out every year.
Also I'd suggest just lie on your back with your planisphere and a red torch (to preserve your night vision) and learn where different constellations are, which makes it easier to find more interesting fuzzy things.
Enjoy
Jim