Eye contact :

I'm a very shy person, I want to improve Eye contact  

I think when I chat with friends If I can't look into the other person's eyes, it will convey the feeling of lack of confidence and make the other person uncertain whether they can believe you.

Show kindness:

I often put my hands down when I'm thinking, I think it's impolite

I should avoid crossing my hands across your chest, raising my chin, and turning my body sideways, which can create a sense of distance.