Hatari,
i was lucky many moons ago that my father let me learn my way and handles different shotguns.
i had the luck too to be in a shooting club where they teach the natural way and not forcing.
i was left handed with left eye as a dominant and im still those days left handed.
the easiest will be to find a BPS (bottom eject) are the other shotguns will be a little more expensive or hard to find.
Phil