If You plan on using WebEx, CATL has assembled some resources. Check out their site at https://centre.cc.umanitoba.ca/webex-support/
Also from CATL -technical guides to assist with using WebEx
How to use personal rooms: https://centre.cc.umanitoba.ca/wp-content/uploads/2020/03/Webex-Personal-Rooms.pdf
How to use WebEx for office hours: https://centre.cc.umanitoba.ca/wp-content/uploads/2020/03/Webex-Instructor-Quick-Guide-Office-hours.pdf
How to use WebEx to deliver lectures: https://centre.cc.umanitoba.ca/wp-content/uploads/2020/03/Webex-Intructor-Quick-Guide-Using-Cisco-Webex-to-Deliver-Lectures.pdf
Also, for these topics - some video demonstrations:
A short video on getting started: https://www.youtube.com/watch?v=60lX_A3Inqo
A short video on using your personal room: https://www.youtube.com/watch?v=YZ9hrdLbqhk
Using WebEx for office hours: https://www.youtube.com/watch?v=ZevnakOX1y4