There is a recording test that you are able to do at the beginning of this process.  Record a few seconds of audio and then play it back to ensure that your microphone volume level is high enough and that your audio is clear.  If the volume is low go into your audio settings and adjust your output volume to increase it.  You may also consider using a headphone with a microphone in it for more direct and clear audio recording.  If you do this make sure that the microphone is recognizing your input microphone/headsets as the input device. You can check this in your audio settings.   This will also be picked up in your recording test. If you do not hear any audio you will need to check your audio settings to adjust before proceeding.