newcomer misclick, can't undo mistake

As a newcomer attempting to familiarize myself with Zoom, an accidental click found me looking at myself about to host a meeting. I don't want to host . . . I want to attend! With a gazillion hosting options, the only one missing is how to cancel/delete my unscheduled non-meeting. (This may also be an obstacle for attending an upcoming meeting, as I'm unable to complete the required signup.)

Please advise; thanks in advance.