Get your hands on the club properly and learn the correct grip pressure by sliding two tees between your thumb and forefingers and hitting balls without dropping the tees
The key to a bunker shot is to eject the sand from the bunker and have the ball go with the sand
Push shots are caused by a swing that is too shallow and from the inside, many times caused by the body moving in front of the ball during the downswing and causing the club to get stuck behind the body