I prepped for the Half Double by watching a couple of YouTube videos. This one showed and explained it so I felt I could begin.
Librariandoa has twelve beads rather than the required ten. I figured I could work in the two extras somehow.
Made my chain of 34, check.
Added a row of single crochet on top of my chain check.
Get to the half double stitch, make one, check.
Go to make a second and it all goes kablooie. Tried to back up a couple of times and suddenly my tidy end of the row had unravelled and I had to start all over.
Try try again later.