I feel fortunate that I went into USAF at 18 (in 1976) and was taught weapons safety, shooting fundamentals, nomenclatures of various weapons, and given the opportunity to demonstrate my competence (repeatedly, based on my specialty). As my specialty was law enforcement with security as a secondary, I remained in gun culture for a long time and even when I promoted out of those initial specialties, many friends and I shot regularly. So when EDC became the soup du jour, I understood ballistics, recoil, nomenclatures of pistols vs revolvers, etc. About the only thing I didn’t understand was “striker fired”, but I’m a quick study and went through a bunch of those before I settled back on SAO, DA/SA, and J-frames.
Someone above mentioned shooting a gun before buying it for use. I could have saved some serious money with that philosophy, but I’ve truly never fired ANY gun where I couldn’t hit well at EDC distances so I’ve bought lots of guns sight unseen without having fired one of its type. I have bought guns I just found “meh” to shoot and moved them on when I got bored with them.
Someday I’ll post the list of guns that passed through my hands, how long I had them, and how many rounds before I moved them on. It’s a long list…or seems that way to me (though when I post it, I’m sure others probably have me beat

).
IMO, the biggest mistake a first time gun buyer can make is following an article listing the “mistakes a first time gun buyer make”, here or elsewhere. If you don’t have shooting friends you trust to help you, find a USCCA, NRA, etc. certified beginners course with a certified instructor, take a course, make some shooting friends. If that’s not an option, find a reliable range and talk to folks there.
IMO, EDC and guns is not one of those things you can learn, train, and master from words on a page. It requires interacting with others, tactile training, and when you feel confident, LOTS of practice to prevent skills from perishing.
But if you want to go buy a .44 snub for your first gun and/or EDC, I won’t discourage you unless you ask my opinion. It’s your money and I would never be so bold as to tell you how to spend your money.