Hi Moira and welcome!
I must say, I think for your first recording, you did admirably well.
My only issue is with your volume, which is at an astonishing 68.3! The acceptable range for Librivox is 86-92, although about 89-90 is considered ideal. I had to lean in really close to hear what you were saying
and I would definitely recommend that the next time you record, you do it in the same room where your computer is. Haha just kidding. I think it's great.
Increasing volume in Audacity is pretty easy.
Open your file. You will notice on the left a sliding scale under the Mute button. Slide the scale all the way up to 22 and then re-save your file. That should bring your volume up to 89. Use the Volume Checker to make sure it is now at an acceptable level (read about the Checker in the Newbie Guide to Recording). Use the Checker every time you submit a file to make sure your volume and other settings are acceptable.
Then: Listen to your new file. If the huge amount of volume increase has caused distortion in the sound, then you may have to re-record the file (fortunately it's a short one). Our BC or MC might have some other suggestions too.
Good luck and please don't hesitate to ask if you need help. And don't be daunted by all this -- even I learned it.