Another suggestion, instead of tying to hover at 0 airspeed while learning, try to keep just enough power to slowly climb vertically and try to maintain control as the plane slows down to 0 airspeed. As you get better keeping the plane under control, you'll will be able to get closer to actual hover. With some vertical airspeed, it is easier to regain control because it has less of a tendency to flop around in unpredictable manner.