You’re going to experience all the audiobook problems. “I can hear traffic sounds, my background noise is too loud, I have clicky sounds, I sound like I’m recording in a bathroom,” etc.
You in particular probably shouldn’t be recording anything on the computer.
This is an affordable home studio with a stand-alone sound recorder. Zoom H4 pictured. I have used a Zoom H1n as well.
https://forum.audacityteam.org/t/too-compressed-rejection/52825/22
The audiobook mastering tools solve a lot of problems. The goal is to crank out chapter after chapter with everything the same volume. That sounds a lot like what you’re doing.
https://wiki.audacityteam.org/wiki/Audiobook_Mastering
This is the short form.
A note here that MP3 files don’t have precise, standard stop and start times. For example, people trying to produce loops, a repeating sound track where the beginning and ending match almost always fail when they try to do it in MP3. You don’t have the precision requirement, but still. That’s going to happen.
There is another MP3 problem as well. The sound quality gets worse as you edit and do production. Do everything in WAV (Microsoft) 16-bit until you get to producing the actual product clips. Then make the MP3s.
And yes, as Steve above, record the work in large blocks instead of trying to do it phrase by phrase. That will increase the chances of a smooth flow and allow you to blanket apply the mastering tools.
Koz