How Do You Prepare for Panels?

I used to be very nervous about public speaking, like most people. But i forced myself to do it a lot when I was first starting to self publish and then get published in other ways. Practice helped me not have those sort of nerves. And even now, ifits, if i'm faced with a question that i don't know or i don't think i can add to either, it's like you kind of pivot into something you do know, or try to benefit the audience and the listener in that way. You would never know from your puckess that you were once afraid of public speaking. It's very daunting the idea of speaking into avoid and doing a sol pacast.