Not sure if you’ll see this comment but just read this topic. In my experience teaching young green horses, alot deals with the inexperience and insecurity of the horse. A remedy I’ve used for many years is in the round pen where the horse learns to rely on you for direction. There are some great training videos on clinics illustration this training method. I would cease to attempt to progress your horse’s skill level until you have gone back to the basics of longeing and/or round pen training. This approach will put the horse in the proper mindset to trust you and build his confidence. As another commentor advised, go slowly when asking for advancement. Return to a point where the horse is comfortable and continue to teach a new skill in small increments. Horses learn by repetition and the rider has to be patient and considerate.