The pros say that a bunker shot is the easiest shot in golf. If that's true, why do amateurs have such a hard time with it? If you learn the basics and practice, you can get it.
First, manage your expectations. If bunker shots are a problem for you, your goal should be only to get the ball out and onto the green. Let the pros hit it close. For you, just get it out so you can start putting, and maybe get that sand save.
Set up for the shot properly. Your clubface must be wide open. Spin the clubface open so your hands stay in the same orientation to your body, rather than turning your hands to the right to open the face.
Adjust your stance by swinging it around to the left so the bottom edge of the clubface faces the pin. You might think the shot will go way left, but trust me, it will go where the clubface is aimed.
You don't need a special swing for a sand shot. Use the same one you'd use to hit a 6-iron in the fairway. Just make it a little shorter and a little slower. How slow? Make a full swing with holding both a 6-iron and a 7-iron. That slow.
Before you step into the bunker, set up and take a few practice swings through the long grass that surrounds the bunker. You're getting used to the feel of the club being resisted during impact and not being bothered by it.
Now step into the bunker and set up, clubface open, stance swung to the left, ball forward of center. Wiggle your feet back and forth, in place, to give yourself a more secure footing. You're ready to go.
The key to a sand shot is to let the sand take the ball out, not the club. Hit two inches behind the ball and let the sole of the club slide through the sand. You should hear a thump followed by the club sliding through the sand. Gary Player says this sounds like striking a match.
Stay calm when you hit the shot. There was no tension in your mind when you took practice swings through the grass, so keep that same frame of mind when you swing through the sand. If you do, the next sound you hear will be someone saying, "Nice out!"