Here is a ‘course’ of videos to help audiobook narrators get acquainted with and use Reaper!
https://www.youtube.com/watch?v=a_FbkRguEV4
Step one is to format the software so you can be ready for anything. Whether you’re a veteran or starting from day one, this comprehensive walkthrough will orient you with basic settings and presets so you can start recording as soon as possible.
Here is a walkthrough on my general workflow when recording audiobooks. While not necessarily Reaper focused in its entirety, I talk through a fair number of ideas that may be useful to you as you record!
https://www.youtube.com/watch?v=86RUVWzLsok
When you’re finished recording you’ll need to export your audio. Here’s how step-by-step.
https://www.youtube.com/watch?v=aRALdg7u3eY
“ACX Specifications”…they can be tricky. Here’s a quick and easy way to ensure you meet them, every single time. The tips in this video can be combined with other processing techniques like compression and limiting to get slightly better quality overall. If that is of interest, check out this video and/or this video about compression for more tips and tutorials.