I am doing a podcast on a voluntary basis with researchers in our field! I have been asked to try to reach the X star researcher in our field who is highly respected in the field. I feel excited, however, I am afraid that podcast could not go well which could leave a bad impression, the podcast would be through Skype, so I don't know how to start breaking the ice before the interview. I prefer to be in person, but in that case, Skype is the only option.
The question: How can I break the ice before the podcasting interview with a star researcher? I am afraid to do counterproductive actions that could affect my career due to the fact that we already in a very small research field.