Fingers crossed for you, MLD. Be your "best" you
Nice firm handshake, look them in the eyes, yada, yada.
I think they look for confidence, authenticity, energy, positive attitude, and even a sense of humor.
It helps me to go through questions they might ask in mind, kind of rehearsing what I might say. Keeps the anxiety level down. Works for me anyway. Some people like to completely zone out, do breathing exercises, and consciously relax muscles in the body. I've done that too.
You will be great
Go get 'em.