find someone who does draft horses, a lot of them know how to do it as I have seen their horses with these braids
No, it's different. That looks like a regular french braid, but with ribbon added in at the base and covering the mane.
With draft horses, the mane isn't braided, it's 'rolled.' Here's what it looks like:
To do that, you take a long piece of material and lay it at the top of the neck so that half is on one side and half is on the other. Then cross one piece from in front of the material and one piece from behind the material over it to make an X over top of the material. Then cross the material from the right side of the neck to the left side and from the left side to the right side.
Then you take a piece of hair from behind the material (closer to the horse's butt) and cross it over, then cross the material over again. Repeat that until you run out of mane or material.