I would be willing to participate, although I think that 30 minutes might be either too much or not enough. We'll see. ;) Hit on the right questions and you won't be able to shut me up. ;) hehehe Unfortunately, not everyone has a "radio personality" and if the beginning of the interview does not almost immediately capture the listeners' attention, they are likely to bypass them rather than spend 30 minutes listening. You'll need a hook at the start, my friend, which will likely require editing the audio to put something very interesting at the start.

What questions would you ask? As a novice here (but a user of BBSes since the late 1980s and the Internet since the mid-1990s), I am not sure what sorts of questions would garner sufficient interest from Steemers (is that an acceptable alternative to Steemians?).

I think it is a great idea to come up with ways to help new members! I joined Fiverr last year but quickly realized that, short of an amazing advertising campaign (which I'm not good at), I would never earn a penny there. Established members crowd out all the new ones. I feel like the odds are somewhat better here, especially if someone "big" latches onto one of my messages for some reason, but there is room for improvement - and help! I try to spend some time each day curating, too, to encourage and give feedback to help others. I've noticed that the idea of curating earnings is sweeter than the reality - I think many people don't bother to read other people's comments on a message, let alone upvote. Have you noticed this as well, or is this just the mistaken observation of a n00b? :)

I have to wonder how you'll keep up with the volume. An alternative to recording voices would be text messages, but you already know that.

You've already been given two reasons why not everyone would want to do an interview: ESL and anonymity. I can add to that list shyness, performance anxiety, social anxiety disorder, fear of failure, stuttering, and stage fright, as well as those who don't use English at all (I'm an American in Indonesian, so you can give me a bilingual interview if you like). There are other reasons as well, mostly psychological. This is not to discourage you but to prepare you so you can figure out ways to help all the people out there who fit into categories like the above.

I'm willing to help you, if you like, although I don't know how much use I'll be. I'm an educator, armchair psychologist, and a bunch of other things, and I'd like this to be a great place (not like some other socmed sites that are full of vitriol and lies).

I certainly wish you success!