Hi, Lynette! Very fun story - love your accent for Gareth!
This recording is almost ready - the volume doesn't pass Checker parameters, though. Normally, I would advise doing Control-A to select the entire track, and apply X amount of Amplification to raise the volume, but there are a few peaks in the middle of the recording that will clip if we do that. So - if you select the entire file, and run the effect "Compressor" on it (just click OK to use the factory-set numbers in all the options) - it does raise this recording's volume enough to pass Checker, without clipping the peaks.
Moving forward with your next recordings, I would bump the recording volume up by maybe .2, and see what that does for you. Another thought, purely for fine-tuning recording style: Probably 95% of us start out recording at the rate of speed that we are capable of reading aloud, which is a little faster than the rate of speed at which the human ear/brain process the information when it's not seeing the print at the same time. It just takes a few recordings to get comfortable with a little more leisurely pace - it feels pretty uncomfortable at first, I still remember, to speak slower, and also insert pauses between phrases more often than we're used to doing. Your first chapter, here, is a wee bit fast, but in no ways enough to be re-read. (If you are comfortable playing around with the recording software, try highlighting the track and applying the Change Tempo effect on it - perhaps with -3 or -4 in that percentage change box. Slows a recording down without changing the pitch. Fun stuff! But this does not need to be done to make the section PL OK)
Anyway, when you have the volume fixed, re-export so you get a fresh mp3, upload the file again, and post the link here. We'll get this section checked off.
P.S. - I was assuming you're using Audacity - hopefully, if you're using something different, it will have the same effects available that I was talking about!