I finally figured out how to do this hairstyle on Kirsten.
From the back.
First off, I did the braids upside down. So I laid her down on her side, and braided them UP instead of DOWN.
Then I twisted them up around her head.
Secured the ends with mini jaw clips in the back at the nape of the neck.
And I used a bobby pin on top to hold the braids in place.