Excellent delivery.
The standout problem with that is reverberation from the room.
Expansion can help reduce reverb, (and push-down the noise-floor).
Expansion makes the quiet bits even quieter, but leaves everything else alone.
A good free expander plugin is “Couture” …
https://www.auburnsounds.com/products/Couture.html
There’s no real post-production fix for reverb.
The only true cure is to treat the room* to deaden reflections.
[ * or closet ]