If you need help on how to use digital cameras, your TRT will be able to get you started.  If you need more help, here are some excellent resources:

Photo.net Offers a beginners guide on everything you need to know about using a digital camera.

Science Junction This site provides information on resolution, connectivity, exposure and zoom as well as other links. 

Photography Review.Com  This is a cool site that not only provides information about how to use a digital camera, but it also provides tips on taking better quality photos.

MalekTips  This site provides great information on what to look for when buying your digital camera.