I’m a dressage trainer. I Did Not use a dressage trainer to start my youngster, because most are not educated in young horse starting: They may be lovely riders, but thats a separate skill.
Be VERY careful about having a dressage trainer start your young horse. Most have no clue how to do it, and simply longe them in sliding side reins until compliant, then someone gets on and holds them in a frame. They are NOT young-horse starters, and they may have zero concept of how a nice hunter is supposed to go.
The pictures shown are all of my guy with about thirty rides, and only an average of two/three rides per week with a few long breaks. I had to find someone who wouldn’t try to package my youngster up prematurely.
Dressage trainers often do not let them learn to go on a loose rein other than at a walk at all. And forget about getting them out of the arena. They want to make them look like trained dressage horses in a frame from the get go.
I found a local upper level event rider to help me start mine. I specifically told him I didn’t want him put in a frame, and I wanted him to go like a hunter 
He got him out of the arena right away, and let him move freely. We started him in a bitless bridle because he is very sensitive , and it worked great. If I could have found a local young horse specialist (even a western one), that I liked, I would have done that.
This is me on him in the flatwork photos, not trying to put him in a frame. He’s still mostly working off the nose band, but has the snaffle rein on also.
