I did some googling and I found a site that might be of some help to you, called
Webcamworld. It has a step by step explanation of how to get your web cam to work. Although it also has some small pictures of semi-nude women (be warned), the information they give seems to be useful and is definitely not sex related.
If it's all too complicated, you could try
Camarades. They offer free web cam software. When you install it, it automatically creates a site at Camarades for you. One disadvantage is that anyone who wants to watch your web cam has to register (for free) with Camarades as well. There might be other disadvantages as well, but I couldn't find them on a first look.