One of my pals uses this sort of thing. You can leave your trigger finger out. Yes, they make them for lefties and righties at Orvis.
I'd get them as skin-tight as possible. I really do not like gloves for hunting, even for duck and goose in winter. If ducks are coming in, I throw off my gloves. I need the feel of the gun and, even with that, I am not a good shot. Mediocre.
I just do not do enough shooting. I would not mind doing more, but it's a whole day thing like golf and I usually have other things to do too. I am grateful that I never took up golf.