Advice on how to produce clearest voice for audiobook

When you get the echoes and noise solved, you might try AudioBook Mastering 4.

https://forum.audacityteam.org/t/audiobook-mastering-version-4/45908/1

That will take you from a raw, clean reading to a finished audiobook chapter. It solves all the technical problems but noise.

If you have a quiet setup, you may be done.

If you’re following a different system for mastering, then the rules change. You can’t put Noise Reduction at the end and post production tools get harder to manage.

Koz