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.
“Nine-tenths of tactics are certain, and taught in books: but the irrational tenth is like the kingfisher flashing across the pool, and that is the test of generals. It can only be ensured by instinct, sharpened by thought practicing the stroke so often that at the crisis it is as natural as a reflex.” ~ T. E. Lawrence