Problem with falling to side in rear mount
My primary training partner is a fellow white belt, and he has been training for six months in contrast to my sole month of training. However, my wrestling background has helped me in scramble situations and I normally have a dominant position on him. I am having trouble capitalizing, however.
Whenever I get a rear mount on him, we end up falling to my back, or to the side, and from there we initiate another scramble with me ending up in mount or half guard or, worse, kneeling facing each other like we started 2 mins ago.
What can I focus on to keep him still and stable between my hooks so I can work my RNC?