For the shoulder shimmy the moves are very simple it is speed and stamina and later on layering that proves to be more difficult. The move is simple pushing one shoulder forward while pushing the other back and reversing. The larger you make the movement the slower it will be and the smaller the quicker. The goal is to create a uniform movement whether it is a vibration or a jiggle. Practice the move in place until you can hold a speed consistently. Next start to layer the movement of chest circles, walking, figure 8s etc.
Interested in classes? I am currently teaching at Sabala Yoga Beginner Belly dance lessons Sundays 11:15-12:15 and Wednesdays 7:15-8:15 and Children's Bellydance Saturdays 10:15-11:15 and Teenager Belly dancer 11:15-12:15