I teach my kids about the give and take for direct rein by using a door. Less stressful for the horse and for me lol. Hook the reins on each side of the door knob then have her get the door swinging smoothly it won't work if she pulls both reins at the same time. I have them practice to see how little movement they can do with their hands to keep the door going smoothly, eventually they figure out that just the slightest amount of pressure will move the door meaning the smallest amount of pressure will move the horse. You can use a gate too but I have had better luck with the door.