Many people ask me, "Is it hard to learn to shoot left handed after my accident?".  My accident happened Sept. 30, 1997, were I lost my 4 fingers on my right hand.  I've been playing paintball since 1987.
Simple answer is, I always shot with both hands, and you should too.  When you come around a bunker on the right side, your marker should be in your right hand, also if you come around a bunker or building on your left side, switch your marker to the left hand.  You produce a much smaller target.  Also learn to tuck your elbow in too.
I shoulder my marker left or right depending on the situation, which does reduce my profile, best that I can now.  The more you practice with both hand, the better you are going to be.
Simple advise, but it will improve your game.  You should target shoot on the range with your off hand too.