so I'm buyin my first pistol on Tuesday and I'm having a hard time choosing the pistol. I've had my eye on glocks but idk if I should buy a G19 9mm gen 4 or G23 .40 gen 4. its my first pistol and I've never shot both, I don't have a shooting range anywhere close so I can try them out. if you think I should go with a 9mm, I'm also considering a springfield XDM 9mm compact. just saw them online and they seem wonderful. so please help..