In the end you're probably going to have the box of holsters like the rest of us.I'm carrying a Glock 19.
Currently only have a White Hat IWB holster. Looking like I need to add another holster to the mix.
It's a matter of trial and error for most of us.
A good belt is actually the first step. Something thick and double stiched. Most holsters are sized for 1.5" but many of the kydex can be adjusted for 1.75".
Carry position is unique to the individual. It will depend on personal preferences. I like hip carry but others like some of the other methods as stated in previous posts.
I've tried all of them and they all have their merits. The previous posters have probably tried several methods as well before choosing their preferred carry method.
If you like owb carry I'd recommend someone local.
krounds.com
I use his pancake holster for my Sig P226 and my wife uses one for her S&W Shield. It's my favorite so far.