Get the gun under your dominate eye....
Folks,
From someone who does this for a living......to reach your full potential, you need to get any longgun, especially a shotgun for airborne targets, under your dominate eye. Anything else is not going to enable you to achieve your best.
I have been working with some specialist on a program to retrain eye dominace, but so far, it doesn't look practical.
Best advice, if you are left eye dominate, but right handed.....get a cheap Red Rider BB gun, and start shooting left handed.....it will seem very awkward at first.....but it will quickly seem much more natural. You eyes will love it!