How do you deal with the anxiety?

I was an introverted person who minded my business but time passed and things changed. I knew to achieve something better I had to talk better and take the initiative.

So I started interacting on social platforms and started cold mailing and reaching out to people. I am now comfortable with having a chat but when it's a face call (even if it's casual) I always have that feeling in my chest which I only hope you understand and no matter how many times I have done this, I never get used to it.

I would like to know how you dealt/are dealing with it.

I would like to be the one to break the ice.

Thanks in Advance.