What kind of radio show was that?
I would love to make radio, in fact. Talking to people, doing Interviews ...
I am listening to my voice for quite a while now and got some practice in diary recording and pretending that I give lectures. lol --- that made me erasing the insecurities and "uhms" and uncomfortable breaks in between sentences or getting embarrassed not finding the right expressions. But I am so far from being a pro (I read that one actually needs an actor education to become a good speaker). Takes years ... so I must bring milage behind me through autodidaction ...
It was about culture, books, philosophy, that kind of thing. It was not very good, but it provided very interesting experience. There are many tricks to speak better (right distance from microphone, speaking with a pencil between your teeth, etc...) I'm working on that milage myself!