The unused microphone

I had agreed to chair the online discussion because I wanted to hear what the younger members thought. Ten minutes before it began, I worried that nobody would speak. A moment later I imagined the opposite: two confident people filling the hour while everyone else listened. I had written an introduction so long that it left little time for the discussion itself. Reading it aloud made me put it aside. When the first participant joined and asked whether she could share a drawing, I felt relieved. There was already something for us to discuss, and it had not come from me.

In your own words, explain the writer's thoughts and feelings before and at the start of chairing the discussion.