Hello Tom welcome to the village, practice practice practice my suggestion is for you to practice with a piece of scrap wood use a ruler and draw straight lines on it and cut all of them until your comfortable, then with a compass draw circles and do the same now change to a spiral blade and try all that over again and you'll never scroll again. Oh what am I saying just get a picture of a bunny or something simple and go for it you'll make some mistakes but there is no set rules for scroll sawing everyone uses what ever is comfortable for them. Remember ones you remove that pattern you'll be the only one that will know your mistakes. A good scroller is not the one who is flawless in his work but the one who hides it best. just have fun, relax and make sawdust.