Here are some pedagogical recommendations for your use of Zoom:
You can make use the waiting room feature to host virtual office hours through Zoom: the feature allows you to admit participants when you are ready to speak with them, so you can talk to them one-on-one. Participants can be admitted from and sent to the waiting room freely by the host, so you can move back and forth between student conversations as needed. See more in this video from Zoom:
You can use the breakout rooms feature to enable virtual small group discussion in your classes. See more in this video from Zoom, or in these instructions:
You can share this information from Zoom on "participating in breakout rooms" with your students, as needed.
From Faculty Focus, Using Breakout Rooms with Less Stress and Better Results
You can conduct polls during Zoom meetings. These are best set up in advance, rather than done on the fly. See more in this video from Zoom, or in these instructions:
From Zoom on downloading poll results: "You can download a report of the poll results after the meeting. If registration was turned on and the poll was not anonymous, it will list the participants' names and email addresses. If registration was not on, it will show the results, but list the users as "Guest". If the poll was anonymous, it will show "anonymous" for the participants' names and email addresses."