Hello @Gagan Singh Dhami ,
Most of what you are looking for in your question can be found by selecting "Users" from the left side menu and then search for the person you need. I'm also providing a link to the "All About Control Hub" administration web site as it has much more information that would help you out.
https://help.webex.com/en-us/landing/ld-nwespu1-ControlHub/Control-Hub
If you have any questions after reviewing the information on that website, I would recommend making a new post with the specific question you need help with. You should find the CH interface pretty intuitive but the Community is always here to help. Good luck.
