"Improvise, Adapt, and Overcome". I am a lefty and have been shooting for about 40 years. I have learned to adapt to every weapon from revolvers Which have a swing out cylinder for emptying and reloading; to semi-autos that need to kick down the slide release, safety, and magazine; to bolt action rifles that need to have the bolt breached and pulled back; to full auto M-16's.
It just takes you "FORGETTING" how it's "SUPPOSE" to be; and instead LEARNING how it WILL be. Doesn't take long. I.e. When I shoot my SigSauer P220 45, it's actually EASIER as a lefty than as a righty. Again, forget how you think it's suppose to be. I can hold the gun in my left hand; use my TRIGGER finger to release the magazine into my right hand; load another magazine with my right hand; release the slide with my trigger finger; and shoot the weapon without even thinking about it. And I usually do it faster than my counter parts who are trying to release the magazine with their right thumb or using 2 hands. With my S&W revolver, I simply hold the gun upside down with my shooting left hand, so the sights are facing the ground instead of the sky. My right finger pushes the release and the cylinder pops out into my right hand where I empty the spent shells and simply reload. With my bolt action rifle, I've developed the balance and strength in my left hand to let go of the forearm stock with my right hand, hold the gun with my shooting left hand, and chamber the bolt with my right hand. It's actually fairly quick.
Point is, the gun is ONLY considered a RIGHT HANDED GUN because someone told you it was. Forget what you think and let your mind tell you how to work it. There is no WRONG WAY. That's the only problem here. Someone, possibly yourself, has convinced you that you have to operate the gun a certain way. Once you forget that, you will find that there is absolutely nothing wrong with the way the gun is built. Just realize that some guns load one way, some a different way, some eject a certain way, and some another way. There are no left/right, right/wrong, etc... They are just different.