IF it works, Scarlett... don't fix it. Your gun and cartridge are adequate for your purposes.
I find the Glock 19/23 size tp be about perfect for all around use and I carry one IWB constantly, off duty. I use and issued G22 on duty and it fits my hands a little better.
On hands... you can't change the size of your hands but you can change the strength of them. Hand, arm and forearm exercises that build strength/stamina will help your shooting endurance. But the simple fact is that 50 rounds, every couple of weeks, is plenty for skill maintenance; provided your practice session covers the basics that apply to your expected use of the pistol.