I would like to add my 2 cents in agreement with those who cited safety concerns with a reversed-draw holster.
In a high stress situation, you have much to consider and having to remember not to sweep your legs and kidneys, while trying to assess a life-threatening situation, is a lot to ask.
Being a lefty, back in the early days of my life I considered using a righthanded holster and was told in no uncertain terms what an idiot I was for considering that. I've heard it called the dead man's draw and less flatteringly (by my old military handgun instructor) the dumba$$ draw.
Many holster makers will tell you not to use a holster on the wrong side behind your hip, due to the probability of sweeping yourself with the muzzle when drawing. The crossdraw from the front is a different issue, being more concerned with retention than sweeping yourself. For your own safety, I would suggest you train to draw "palm forward" and try to become comfortable with that, before adopting what is accepted as a more dangerous configuration.
Best of luck!