Is my setting right or wrong

[Trebor]

Presumably, the listener will only hear the right sound?
Because it is set to between +1 and -1 so neither too high or too low.
Is that correct?

The waveform became fatter when I did a little tweaking with amplify/normalise/compress.

Typical settings for speech are RMS Normalize* to -20dB,
Then (soft) limit to -3dB, (no make-up gain), to attenuate any unusually loud peaks.

[ * “RMS Normalize” is not shipped with Audacity: it’s a plug-in you have to install into Audacity].