- Get a headset so that others can understand you well (cameras are secondary, good desktop mics are much more expensive).
- Add an initial slide with class/meeting rules (mute your mic, ask permission to speak, use the chat, etc.)
- Understand how these three things work: Screen sharing, Mute all (VERY important), Recordings
- Use the PowerPoint “laser” and annotations to highlight materials and keep people engaged. Also check if the Whiteboard app (https://www.microsoft.com/en-us/p/microsoft-whiteboard/9mspc6mp8fm4) works for your class (it has a web-based version).
- Pause often and poll the audience for questions, so that newcomers learn the dynamics of unmute/mute, taking turns to speak, etc.
If you can't find a good mic for your computer, consider joining the call/class simuntaneously with your phone (via Wi-Fi) and using that as a mic -- most smartphones these days work well as speakerphones, and big, easy to use buttons to mute audio