If you are going to regularly host a video (or audio) conference with WebEx, you should request a WebEx account. You should also plan to spend a few minutes learning the various options. Schedule a test meeting with a colleague or two before you host a "real" meeting.
WebEx is straightforward to use and has several options you can customize. Here are some training resources you may find useful:- WebEx Quick Start
- Selected Cisco videos to be added here