Here are some hints before you join the gathering.
Shut off all wireless devices except the one on which you will be using to participate in the Zoom gathering.
You can put your cellphones on airplane mode
This will allow all of your internet bandwidth to be available for the Zoom gathering.
Check to make sure your microphone is turned on.
Check to make sure your camera is turned on.
Check at the top right hand of your Zoom screen to be sure that it says Speaker View (this will allow you to see everyone who is participating in the gathering) Counter intuitive, I know.