Please find below a link to Level 2, 3, and 4 APJA judging courses. Even if you're never intending to judge, the information from these one day courses will give you a much better idea of the process used by trained judges. You will also hear some great presentations and view terrific pictures.
You don't need to qualify for Level 1 to attend Level 2. The cost is quite moderate and it's a great day out.