Lying on the side, reach the top leg in front. Practice shifting the weight and lifting the butt up.
Tuck the chin and slowly shift until the weight is equally distributed across the upper shoulders.
To get off the shoulders, bend one elbow and bring the ribs towards the elbow until they connect.
Practice getting up onto the shoulders and back down to the ground. Arms start and end bent.
As the butt lifts swing the leg and shift the weight onto the other shoulder. Start slow and build.
Try keeping the arms and feet connected to the floor the entire time.