Each of the above posters has made solid, reasonable suggestions.....
Study up some by reading reviews...both good and bad reviews... you tube has lots of gun reviews done by self appointed experts...
One of the better guys who's been around guns for at least 50 years and does a multitude of gun reviews (in depth) is Hickoc45...
HICKOK45 - YouTube ... go to his channel and learn something about guns, ammunitions and assorted gun related gear. Subscribe to his channel and you'll get several emails each week announcing new videos on different guns.... He is interesting/entertaining, and knowledgable... and has several hundred gun reviews...I guessing ~ at least half are handgun reviews.
I personally like and use a semiauto Kahr CM9 (a very small, and smooth 9mm 'pocket' gun)...I've also carried other semiautos and wheelguns over many years..., in 38 SPL and .357 mag., 9mm, .45acp, and .380. I also owned several varieties of .45 Colt 1911's, Browning Hi-Power 9mm, Browning BDA .380, Beretta .380, S&W Mod 27 .357mag, S&W 60 .357mag, S&W 686, S&W 586, Colt Python 357mag, Diamondback 38 SPL, Ruger: Speed Six 357, Security Six .357, Blackhawk .357, Dan Wesson .357, Bersa .380's & 9mm....and my list goes on and on.... and as I stated, I've now settled at this point in time to a Kahr CM9 9mm (7 rnd)...PERIOD.
So, study up on some guns, try some out if at all possible, and then...
Good luck with your gun decision...