You might also want to follow the link in my sig to the Reorganized Modding Manual thread. That document might be easier for a beginning modder to use than the official one due to the way things have been arranged in it. The official manual organizes commands alphabetically without regard to what commands are similar to each other or do similar things.
Great! Thanks everybody, especially Edi, you've been a great help. I've been looking through the forums and everyone's much more mature and sensible than on most forums