Alright.
I'm using MO2, so I had to rebuild my First House, because I couldn't figure out where the file.esp was stored. It took a while to even search my Local HDD for a "PathTest.esp" file, though I finally figured out it's stored in the "overwrite" folder, which bummed me out, because I was in a habit of deleting that content to get rid of the notification. I actually was able to rebuild my house considerably quickly, & I built it a little differently.
Rebuild
& then the Lesson #2 content:
First Image
Second Image
Third Image
Fourth Image
Fifth Image
Sixth Image
Seventh Image