As mentioned there are many videos offering tips how to improve one's grip on a pistol. Here is another one for consideration. Notice any significant difference? Which one might be best for you or do you have another resource in mind?
Whatever works best for you, be safe and shoot accurately.
From the She Equips Herself channel is a woman who explains how to hold a handgun;
One of the best things you can do for your gun is hold her properly! In this video, I show you the way I grip a semi-automatic handgun in order to improve accuracy and control over my gun. I hope this helps some of you out!