I don't completely understand your questions, but I'll do my best...
If you're a lefty I'd suggest carrying just behind the point of your left hip, so around 8 o'clock. The butt of the gun should be toward the rear allowing you to draw easily with your dominant left hand, so you will want a left handed IWB holster. Trying to draw from a right handed holster in this position would be very awkward.
Ideally, your new holster will allow for cant adjustment. This is pretty important because no two people have the same physique, and it's nearly impossible to know how something is going to feel until you've tried it. It should also pull the rear of the slide & the butt in snugly against your hip to aide in conceal-ability.
Personally, I like the Tucker Texas Heritage & Answer designs as well as their clones. Galco's Summer Comfort holsters are nice too, but I don't believe they're adjustable.