I started by sectioning what I wanted in the braid & clip the rest back so it doesn't get included. I failed to show that I brushed the hair that was going to be included in my braid forward since you are only taking from one side. Makes it much easier - you'll see once you get going.
I realize this isn't a very good picture but just wanted to give you an idea how the braid goes. Start with your regular 3 strand braid. When you come around to the RIGHT side, grab a strand from the hair brushed forward. DO NOT grab anything when you get to the left side!! Keep going until it's the right side's turn again & just keep grabbing as you go along only from that right side. Make sense?
From the front, this is what it looks like. Add an elastic to secure the braid.
I pulled the rest of the hair up into a side pony, including the braid. This is what the braid looks like from behind, you can see how it looks like it on it's side. If you wanted, you could only grab from the left side & this would be in the front. Up to you!