TL:DR version. Full version is here – 11 minute read.
1. Run through it first
2. Train yourself on the platform you’ll be using
3. Have more than one person host
4. Make sure the sound works
5. Make yourself look good
6. Put your role and pronouns in your name
7. Set up a welcoming environment
8. Talk people through the features
9. Bear in mind different needs
10. Tell them the schedule
Finally: Go to some really good events to see how they do things