The main goal is for you to be comfortable, to feel comfortable, to look comfortable.
Many people might tend to overthink: What should I do with my body, with my hands?
Definitely use your hands, to support your speech. Simply not in a very special way, I guess that you’re already doing this every day and you’re not focused on it while doing so.
How you speak, try to speak from down body, not your head.
Movement, loose yourself and move around. Speak with your hands