Found the book that the teacher of my first classes made each of us buy. We learned to rotary cut from it and then our intro to piecing was the sampler in it. The book is: Rotary Cutting with Alex Anderson. After these classes I, as a beginner was able to do even the dreaded Y seam. When done with this sampler you have tackled all the basic shapes and angles you will ever need to know. I have looked at many books for beginners and feel this is the most complete to get started.
Connie