To see the list of live classes starting in the next 24 hours, just scroll down on the main page. There you will find the titles, class descriptions, and the start time.
Once you find a class that interests you, you should click on the "Register" button. If you want to feel more prepared for the class, you can use the "Download the material" option to see the materials that will be used in the class.
You will receive an email reminding you of the class 15 minutes before it starts; and when it's time to join, you will see a button that says "Join Now".
If this is your first time joining a live class, your browser will ask for permission to access your camera and microphone.
Once you enter the session, you will see a control panel where you can unmute yourself, review the participants (up to 8 per class), the chat, etc.
If you want to see a list of all the classes available in the month, you can review them here: https://www.campus.live/en/live-classes/. Just select the flag of your country to see the schedule in your time zone.