If you are left-handed and have a dominant left eye, you are blessed! Practice left-handed, shoot left-handed and it will quicky become natural to you.
The reason that most of us lefties do things right-handed is because we were taught by right-handers, or simply because there isn't a left-handed option. I think that the Marines borrowed their "adapt and overcome" attitude from us lefties!
I learned to shoot rifles right-handed, because I am right-eye dominant, and 99.9% (my own statistic) of rifles are manufactured for right-handers. And, the M-14 puts hot brass down the neck of left-handed shooters. Also, in the Army, I was taught to shoot my .45 right-handed, and there were only right-handed holsters. My right-eye dominance helped there, too.
With a little time...and ammo...to spare at qualification, my DI said he was taking all the credit when I qualified "expert" right-handed AND left-handed.
Criminals obey "gun control" laws in the same manner politicians follow their oaths of office. – Anonymous