This type of grip shows an introverted curvature. Notice how the thumb is hidden by the other four digits. This is similar to how you hide your thoughts and feelings from all but a select few. You don’t mix much with people and prefer solitude. You don’t have a big group of friends because you hate drama. You get along with a few people and keep good company. Prefer the frank ones. You know that many people are scammers and avoid those who appear to be wearing a fake persona.
On the inside, you only want people in your life who you can have conversations with that actually mean something. You want to talk about something deeper than a general chat. You love the company of those you choose, but after a certain point, you have to be on your own. Having your own space and privacy is important to you. You hate people who waste your time and those who walk into your space without giving your opinion.
You are a gentle soul, who does not wish to harm anyone. You are at your best in solitude, ruminating on yourself. It gives you a sense of calm.
Reading body language is more of an art than a science and can be wrong sometimes. However, these three types of fists are usually a good indicator of the type of person you are. No matter what kind of person you’re meant to be, there are a lot of plus points. So, remember, you don’t need to change, and for all you know, the type of grip you have, in your case, doesn’t really fit your personality.