If you want to shoot like the pros using an SLR camera, you'll need to learn about focal lengths, apertures, shutter speeds and film speed ISO. It can get pretty technical!
The SLR Camera Simulator is a very cool website that lets you fiddle around with a virtual SLR camera to achieve a great-looking shot. You'll have to deal with ambient lighting and motion.
http://camerasim.com/camera-simulator/