All of the weapons you listed have pretty good reputations for reliability. There are probably 50 or more other makes/models that the same could be said of though. The equation is not just about the manufacturer or dimensions of the weapon you end up buying and/or carrying. There are intangibles and raw data to consider, which opens up your evaluations to an extended and in-depth study before you can really articulate in a few short sentences what it is you're in the market for. Or not. When I was your age I got my first permission slip after buying a High Standard Mark IV in .22 mag from a friend/co-worker for real cheap. It was a revolver that held 9 rounds. Great little gun. Nothing special, but it served my purposes at the time. A year or so later when I started making real money, I started buying guns two and three at a time, rifles, shotguns, handguns, large caliber, small caliber and everything in between. At one time in my early to mid 20s I had over 100 handguns. My "research" back then consisted of buying something, shooting it, practicing drawing from concealment, and then selling it if that "research" didn't produce my desired results. I am a big guy, but back in those days I was so skinny that I had to run around in the shower to get wet, but concealment has never been that big of a challenge for me, including back then.
I'm down to a little more than a handful of guns these days. I open carry almost all the time, but I still have the gun that I trained with and carried the most when I was still concealing. My daily carry (open) is a S&W 4563TSW. You'd be hard-pressed to find that weapon on anyone's "greatest carry .45 of all-time" list, nor would I put it on such a list of my own. It's just the .45 that I ended up keeping, and like that old High Standard, it suits my purposes just fine.
My conceal carry gun is also one which doesn't appear on many lists, an alloy frame CZ 2075 RAMI in 9mm that I've had for around 10 years I guess. Both it and my .45 are DA/SA mechanisms. Both have an external safety. The .45 has a hammer-drop manual safety, and the 9mm's safety can only be actuated with the hammer cocked, so someone coming from being used to a 1911-style action (carried "cocked 'n locked") could carry the RAMI the same way without having to transition from that to using the double-action pull as their first shot, and single-action every round thereafter.
I'm not a brand, caliber, or type-of-trigger-mechanism "shamer," nor am I a fanboi of any of the same things. I've got Craftsman, Milwaukee and Snap-On tools in my toolbox, and Stihl, Husqvarna, Troy-Bilt and Poulon gas-powered lawn and garden tools and chainsaws hanging all over the garage walls. I use 'em all. None are my "favorites" overall, just one might serve one purpose better than another, so that's what I use when working on that purpose. My guns are the same way now that I don't really collect anymore. My .45 was too big and heavy to carry comfortably and concealed, but generally-speaking, I prefer the bigger caliber, longer sight-radius and the way it fits my hand over the RAMI, so for purposes of concealed carry it didn't suit my purposes and the RAMI did/does, and vice-versa for open carry.
I said all that to say this; You're probably going to spend a lot of money because of going through a lot of guns, holsters and accessories, before you can really say what works best for you. Nobody here can give you the answer to that question until you yourself can articulate all the varied reasons that you like or dislike a particular brand, size, caliber or the pretty important consideration, "feel" of weapons you've actually fired quite a bit. You will learn how to effectively conceal the Glock 26 if that's what you buy, but you may just find that effective concealment isn't the only data-point that you end up choosing a gun that you will stick with for a long time on. Or not. The 26 may be perfect for you. Only trial and error will answer that question though.
Oh, and welcome to the site and good luck.
Blues
