Lloyd3,
You are experienced and competent enough that you shouldn't have that much trouble learning the drill. Just buy a gun you think will work for you and use it. Just cock one hammer at first and pretty soon you will find yourself able to cock both of them. When you were learning to drive, I'm pretty sure you ground the gears a few times but then you learned to coordinate the clutch, shift lever, and accelerator. Now it is probably second nature to you, and it will be the same for a hammergun with a little use. It is true that they are not as easy as a hammerless gun with a tang safety, but if it was, we wouldn't have hammerless guns. Just remember, you can do whatever the old hunters could do.
Mike