I'm might soon be in the market to expand my collection from one gun two two. I currently have a Glock 34, which I've been learning to shoot with the past year. I'm looking for opinions on which firearm should be next in line. I understand supply limitations are a thing, so the advice I'm asking for assumes supply is available, even if that doesn't turn out to be true.
Options:
Glock 19: I can carry the G34 AIWB, but it's not small, and induces wardrobe limitations. A 19 would I have a shorter grip and be a bit lighter.
LCR 9mm: This would be a pistol that is significantly smaller than the G34. It would be a significant change in how a gun could be carried, instead of simply slightly more convenient (19 vs 34). 9mm keeps ammo the same.
Shotgun, probably Mossberg 500/590 of some type, but maybe I'd just follow the experts advice and get the Beretta 1301. This option is under consideration because I'd like to learn how to use a shotgun in addition to a handgun.
Thanks for any advice.