This hairstyle is very easy to do. Just make 3 sections and start braiding the two front sections straight back and stop braiding at the mid part line. Then continue plaiting the hair to the end. Do that for both front sections.
Then create a pony tail for the back section and include the two front plaits in the ponytail. Then 3 strand plait the back ponytail and wrap it around like a bantu knot. That's it!
I made the 4 small cornrows around her edges because they keep the edges neat longer to help make the hairstyle last for a couple of days. It also prevents her from playing with her edges (a bad habit that she has).
If you want to do the 4 cornrows around the edges, do them first, then do everything else.