Remember too that you can redirect questions. They might never ask about your best friend as a kid, but you have rehearsed the story of something you did and that story can be used as an example for 20 different questions. While telling that story you don't really need to think about it so instead you get that entire time to figure out the conclusion where you tie the story back to the question.
Being interviewed is a skill. You can practice it.
Run through your slides in front of your rubber duck, as if they're the audience.
You want to program your brain to work like a soundboard - for topic X, say "Y". I find it helps me greatly to have these prebaked responses ready to go, and I get to choose when I'm talking whether I adlib entirely or just repeat the same script i trained.
Often even during the talk there would be times I'd feel out of it, distracted, or something else. Then you just do rote script until your brain recovers and you can be fully "on" again.
Finally, people LOVE hearing stories. So the more stories you can work into your answers or your presentation, people will stay engaged. This is a common thread from watching many very competent presenters at cons
He should always be prepared to talk about his first interest in music. His first time touching a piano. Why he choose piano (which may have been his parents forcing it at first). What other instruments he plays. What is favorite music is. Details about whatever piece is performing now (maybe spoilers on what he is practicing but not yet performing). Ideally he should listen to modern music so he can connect to kids by talking about something popular today (maybe even play a piano arrangement of it).
Those are the basics that he should have an easy time talking about. If he unexpectedly wins an award he didn't expect to be in competition for he might be speechless, but for the above the answers should be easy.
Now if he decides giving interviews isn't what he wants to do and thus switching to a different job where he doesn't have to give interviews (and also will not play publicly much) is the right choice I will not fault him for that. It is his choice and his alone.
I see. I had no idea that was a requirement of being a professional pianist. This all read as incredibly pointless with me thinking that interviews were a side thing for a pianist.
What, the piano show he performs? Why would that be the pianist's job? Wouldn't that be the venue's responsibility?
Edit: I had to look him up. Quote Wikipedia:
> Igor Levit is a Russian-German pianist who focuses on the works of Bach, Beethoven, and Liszt. He is also a professor at the Musikhochschule Hannover.
So it's not like he's taking gigs in dive bars. Do renowned classical musicians typically shoulder the burden of promoting their own performances... through radio interviews?
Be wrong and say stupid things. You will be corrected or correct yourself. Accept the correction and move on. If you feel very wrong, turn it into a question? Instead of feeding back to anxiety you’ll feed back to speech.
Major problems then arise if I have already started to answer the question to avoid an awkward pause, and realize several words in I don't like the answer. Finding a way out of the words you have started then feels like texting while driving along the road with 100 km/h.
I have been in several interview situations in my life (including two on national radio), and the ones that went well were usually the ones where I either knew the questions beforehand, or in which I was asked questions I had already thought of and memorized an interesting answer.