There is no simple answer to the question. You have to go out and handle the different guns out there. You need to find that one that fits your hand the best. That is the gun you will most likely shoot the best.

Granted, it's not as simple as that. However, you do need to not only think of how well the gun fits you, but how well you can handle the recoil of the given calibers. Different guns are easier/harder to control than others. Even the same guns vary with different ammunition types for the same caliber.

Basically, if you can go to the range with someone who has shot handguns, and rent/use different ones you can get a feel for them pretty quick. You will learn a lot quickly with the right instructor.

Oh, and this may seem strange, but getting a .22 LR pistol/revolver to practice with will help out your mechanics a lot. Getting two handguns to begin with actually makes a lot of sense.

I have never heard of Kaha Arms either. Are you referring to Kahr Arms? If so, they make a good product.

Do not tie yourself to one manufacturer. Go and handle them. Keep an open mind, and you will have fewer regrets when you buy your first gun.

I'm a revolver kind of guy. I went with a S&W 327 TRR8 so I would have an 8 shot revolver vs a 5 or 6 shot one. Mine is also full sized which means I can use it for other purposes. It's also easy enough to hide.