First gun? Yes.
First holster? I don't know.
Granted, it's not such a huge deal in my case because I purchased my first gun in 2015, but I can safely say that I'll never sell it, nor will I ever sell any of my guns if I can help it.
It's a Walther PPK/S, circa 2013, made of some space age proprietary mystery metal which may or may not be a variation of ZAMAK. Chambered in .22LR.
I purchased this pistol in September of 2015 after a sudden surge of violent crime occurred within my residential area and beyond, which convinced me that my Home Defense weapons of the time which consisted of a Rawlins Baseball Bat and a BUDK knockoff of the Cold Steel Master Tanto was insufficient, and that in spite of my amateur bodybuilder physique and some limited knowledge of martial arts, I needed to start carrying a Pistol for self-defense.
Being rather ignorant of Pistols, (my prior experience with firearms was limited to Hunting Rifles and my father's old Iver Johnson .38 Revolver) I took to the internet seeking advice on Pistols, where I was greeted by the overwhelming sentiment that anyone's first firearm must be chambered in .22LR because anything else would just be too much for anyone to handle, even a grown man like myself, apparently. But being familiar with .22LR via Rifles, I was aware of the fact that it was potentially lethal, and seeing as I was merely looking for something to use for self-defense rather than battle, it seemed adequate to me.
From there I needed to find a Pistol that would work for me, something small, carry friendly, and easy to break down for cleaning. In my search I quickly found that I didn't much care for the look or feel of modern polymer-framed pistols, so I sought alternatives. I started thinking of pistols I had seen in movies growing up, which ultimately reminded me of the James Bond films and the little pistol he carried. I recalled watching those films with my father and grandfather, as well as some of the later parody films like Austin Powers, and an old joke I had made to my siblings about how if I were ever going to carry a pistol, then it would be that pistol. (In my youth, I thought of small guns as something of a joke because I was used to seeing police and soldiers carry full-size Duty Pistols like 1911s or Beretta 92s. So I figured it was worth looking into James Bond's Gun.
A simple Google Search of "James Bond's Gun" revealed it as the Walther PPK. I had never heard of the Walther brand before, but being ignorant of pistols, the brands that I was familiar with were predominantly American companies who also made rifles or shotguns like Colt, Remington, and Mossberg. The only pistol brands I was aware of were Smith & Wesson, Beretta, and Ruger, mostly because they were name-dropped in Movies/TV Shows.
Anyway, the Walther PPK nearly met all of my needs. Small, east to carry, easy to break down, and available chambered in .22LR. The problem was, it was just too small for my hands. I wanted something that I could get a full grip on, which lead me to the larger Walther PP and PPK/S. I preferred the PPK/S because the shorter barrel made it more easy to carry.
Imagine my surprise when I discovered that there was a new production PPK/S chambered in .22LR, featured an improved magazine design for more reliable feeding, and it only cost $375. SOLD!
Of course, later on I learned that .22LR really wasn't a great choice for self-defense due to lesser reliability as well as marginal performance out of a pistol, but that's besides the point. The Walther PPK/S in .22LR was my first firearm, I still own it, and will continue to own it. It may not be my carry gun anymore, but it still makes for one heck of a fun little plinker to take to the range.