why just one? buy two. don’t forget ammo.

I recommend 9mm. common round, can be bought anywhere.

It’s a bit expensive, but a Glock 19 is a good first handgun.

stay away from Sig, especially the p320. it’s standard issue for police but has a record of just “going off” while holstered.

don’t forget to get a cleaning kit and holster. also helps to take safety training and at least 12 hours at a shooting range.

ranges may require you to buy their ammo since there’s specific range ammo as well as some cheaper ammo you buy online can be dangerous.

good luck.