The best thing to do is just play with the camera. Books, no matter how well written, can not take the place of hands on practice. Set the camera on the tripod, or on a table even, and see what the different controls do. You can tell right away which knobs move the front or rear standards forward and backward for focus, which ones tilt them, etc. While doing this, look at the ground glass and you will see what the effect was. In one way, large cameras are easier to use than any other type... Instead of having to guess what yoru depth of field and focus point is, you can see it just as it will be on the film.