A leg yield is basically a shoulder-in, just not against a wall. The horse is bent in the opposite direction of travel and the legs travel on three tracks making a very shallow angle.
You know, you’re always welcome to submit pictures of you and your steed in action in the court :)
A common mistake made by beginning riders is that the range of the trot is slow to fast, when the scale actually goes small to large.This is why most first and some second level tests we see usually have horses running rather than lengthening. It is not about the speed of the gait but the size of it.
Dressage is not reserved for the Germans and rich retired ladies ;)