Really?!?!? BEST holster?!?!?
I have no idea how big you are, are you 6" 10', 400 pounds, 5" 8" 175. How old are you? 85?, 25? Do you routinely intend to carry while wearing a suit and tie or shorts, T shirt and flip flops?
What works for ME will almost certainly not work for you. Do you have 25 plus years of experience carrying a gun every single day? Whatever recommendation I make will be what I , like and could be totally inappropriate for you.
In general carry holsters will be either inside the waist band, IWB, or outside the waist band, OWB. They will be either leather, or some sort of plastic/kydex. Also you have to consider if you want some sort of retention strap/latch of just friction fit retention.
All of these factors and more make holster choices a highly personnel matter. I can not stress strongly enough you need to find some sort of local instruction in concealed carry.