SHIFT + REC won't record new track

SHIFT + r won’t record new track.
I followed the instructions for setting the latency in Audacity 3.0.4 and when I do the step where you press REC button and hold Shift key it starts a new track but doesn’t record anything.

Is there another way to copy the test click track and then record it on a new track?

Are you overdubbing? Play a rhythm or backing track while you record a new performance?

The instructions also say you need to make a plain, ordinary recording of your microphone before you set up for overdubbing.

What’s your microphone and how do you have i connected? Describe the job.