One of the big issues I see with amateurs in bunkers is they struggle with ball position. Most I see have the ball way too far back. The idea is to hit green side bunker shots contacting the sand first. Forward ball position with weight favoring front leg is a great starting point. Practice drawing small islands of sand in the bunker and splash those out onto the green. You have to produce enough speed to create the force to throw the sand. Take an aggressive swing contacting the sand first using the bottom of the sand wedge(bounce) and watch your shots get consistently out of trouble!