The second, radical choice, is to switch shoulders. I’ve helped a few kids on the trap team I coach to switch and shoot from the side of their dominant eye, and it’s amazing how quickly they can adapt. Often it takes only a few shots before they are comfortable and breaking birds. Of course, they are young and haven’t shot much. You have. Learning to switch sides may be a longer process. I’d start by practicing my gun handling at home with an unloaded gun, maybe for 10 minutes a day. You can also drop an AA MiniMaglite with the beam dialed down to the tightest setting into the muzzle of a 12 gauge and practice pointing and swinging, keeping your eye out on the beam and away from the gun. These drills, by the way, are of value to all shotgunners, not just those trying to switch sides. Finally, when you do go to the range to try switching, use very light target loads. You won’t be used to absorbing recoil on your off-side, and the gun will feel like it really kicks.