I'm new in jitsi and want to know working procedure and also connect host and users in conference

I want to create a video conference web application with JWT token for my internal meeting. Ad admin will be the host and can admin only create a room for conf. Participants will attend into the conf, if any password is given or not. but they cant create any room. Need help how to do it in my own server.
Note: I have already hosted jitsi meet server in my domain. But can’t understand what should I do now to complete my requirements.

You may need to check https://jitsi.github.io/handbook/docs/devops-guide/secure-domain for the same.

Thank you