It always comes down to what works for you. Inside/outside, cant, location, and even the weapon itself -- it's often a matter of trial-and-error, and personal preference. You may not need to resort to stuffing a mouse gun into your crotch, but you also may not be able to pull off an S&W 500 -- even if it is a snubby! Of course, when you're just starting out -- even a P3AT will feel like that 500.
Unfortunately, even seeing something like a holster in person doesn't answer your questions -- as you can't tell how things are going to ride. Suddenly, lavatory stalls, car seats, theater seats, doorways, jackets, and many other items, become something that you will frequently encounter -- and no longer uneventfully.
And you may, perhaps unfortunately, eventually determine that the very weapon that you are carrying does not work for you and your situation. But you should first work with what you have, and then go from there. I've got stuff from OWB, IWB, pocket, shoulder, ankle, and off-body carry. Most of it is scattered around the house, and a bunch of it has never even been used outside of trying it out inside of the house.
