Do you have the book that came with it? If so, most of the answers are in there. If you see a sign with a particular effect you like, such as a drop shadow, just thumb to that section of the book and it will describe how to create it. The best learning happens "on the job" while using the program. You need to do something, you figure out how to do it, and then you know that one. Slow going at first, but in a while it becomes second nature and one day you'll drive down the road, see a billboard or sign, and be able to go over the steps it took to design it in your mind. Thats pretty much how I did it anyway. The book that came with the program and lots and lots of practice.
