While there are several web conferencing tools available, the basic format to hold a web conference is the same for each. If you decide to hold a web conference for a synchronous class discussion, Google Meet and Zoom are good options.
If you use Zoom, use the settings in their Best Practices to ensure a secure Zoom Meeting:
https://blog.zoom.us/wordpress/2020/03/27/best-practices-for-securing-your-virtual-classroom/
Also, review how to manage a Zoom meeting at https://support.zoom.us/hc/en-us/articles/115005759423-Managing-participants-in-a-meeting
Vicki Davis (the Cool Cat Teacher) has created a good video explaining a format to use for holding a web conference with your students