Re: Concealed carry pistol
How big are you? What sort of clothing do you wear?
If you're a big dude who wears loose fitting shirts, it'll be easy. Otherwise you'll need a compact pistol, with very thin, low-profile holsters. I carry a Glock 19 when I can (winter or if I'm wearing a suit), but otherwise a Kahr or a 5 shot Smith revolver. When you're wearing shorts and a t-shirt in summer, you are gonna have a hard time hiding a glock. Unless you're a big dude.
Also, frankly, the $200 handmade leather holsters--Mitch Rosen, etc--generally double the size of the gun. IMHO, they are a liability rather than an asset. The $25 suede holsters are thin, don't allow easy reholstering, but are much less detectable. Unless you're LE, if you have to draw down, the last thing you're going to worry about is how easily you can reholster. There are also ultra thin Kydex holsters--like those made by FIST--which work great. Again if you're a big dude, it doesn't matter. If you are trim, you are going to have more of a problem.
The Kahrs, at least in 9mm, are my favorite--much narrower and easier to hide than a baby Glock, basically the same size as a 5shot S&W revolver, but they have a much longer sight radius than a 642 and shoot almost like a full-sized pistol. My P9 will shoot 2" groups at 25 yards if I do my part. That said, I've found them to be finicky with the 8 round mags. The 7 rounders seem to work with everything, the 8 rounders occasionally have FTFs--which is the known, common problem with these guns. Also the Kahrs eat recoil and striker springs like crazy. No big deal, but they need a bit more love than a Glock does. Still about 1/4 as much as a 1911 does, though.
The SW 642 is the old standard--14 ounces, 5 shots, fits in a pocket. Much shorter sight radius and much harder to shoot accurately than a Kahr. But it'll do it's part if you do yours.
Now if you can carry a fullsize gun--or near fullsize--like a Glock 19, you're in great shape.
I love 1911,'s they are great, but will cost 3x as much to get a reliable one as compared to a modern pistol. I say this as an 1911 owner. They require a lot more attention to keep running, speaking generally. We're sort of in the time of striker fired, polymer framed guns these days, where a $500, off the shelf gun will feed anything you put through it. Not so much with the 1911--you sort of have to be an enthusiast to get one to run like a Glock.
Good luck with it. You might try just the Mexican carry at first--with an empty chamber and full mag. Will at least get you used to carrying a gun in public, and it's the least detectable, by far.