For this fun style start by making 4 small rolls as shown below and secured them with elastics.
I made the rolls diagonally across the top of her head.
Then I took the side hair from both sides and pulled it into an elastic with the ends of all 4 rolls.
Below shows a top view of the rolls and sides pulled up.
Then pull all the her hair into a ponytail. I took a small piece of hair and wrapped the elastic with her hair.
Finally I made large ringlets in her ponytail hair.