Not Recording: Version 2.3.3 and Mojave 10.14.6

Hi
I download Audacity and I’d like to use the internal mic to record my track;
but when I press the button “record” it does not work.

I’ve already verified:
1)System preferencies/privacy and security/privacy/microfone/audacity (It’s OK)
2)System preferences/sound/microfone (It’s OK)
3)Audacity/preferences/gadgets (Dispositivos in Portuguese)/(It’s OK)

I really appreciate some support, because I’m very exciting to use the system… Thanks

What happens?