Please have Your camera turned off and microphone muted when You're not speaking.
Make sure that You use as stable & fast connection as possible (for example, connect through cable and not WLAN; if using WLAN, try to be in the same room as Your router etc.)
Before complaining that something does not work, try to solve a problem Yourself.
Be playful: start exploring functionalities like "chat" and "shared notes"
In case You feel really really lost, write a chat message to Paul, Felipe, Nikoloz or Dorothea.
Remember: friendship is everything