Instant and Scheduled meetings will appear on the home page under Meetings. Scheduled meetings will appear 10 minutes before the meeting starts.
If you have integrated your Google account, the Meetings space by default will show a copy of your Google Calendar.

Rooms are meetings that last for an unlimited amount of time. They’re useful for teams of people or virtual rooms for actual physical rooms.
Different filters are available to control which meetings you can view. My Google Calendar shows a copy of all of your calendar items. My Scheduled meetings displays all CoreNexa video meetings that have been scheduled by this account. All Active meetings shows all currently running meetings in the user’s community (scheduled meetings appear 10 minutes before the scheduled start time).

To join a meeting, hover over the meeting with your mouse and a Join button will be displayed as shown below.

In-Meeting Controls
The in-meeting controls are located below the video tiles. There you find (from left to right) Video Layout, Camera Enable/Disable, Microphone Mute/Unmute, Sound Enable/Disable, Screen Share, Settings and to the far right Exit Meeting.

There are several video layouts available including Grid, Speaker, Click to Select, Horizontal, Limited Bandwidth and Disable all remote videos.