Hey Rat,
This won't make you feel any better, but after two months I still feel like a complete tool trying to fumble with these controllers.

I tried the campaign thing too and thought I was at least competant with the controllers. When you get into a public match then you learn just how far behind the curve you really are. I tried running as a assault, engineer and medic with no luck. I could only kill those who didn't see me first.
Good luck man. I really hope the Move system will be available for this game eventually but I'm not expecting that it will.