Finding an Autism Service Dog in Colorado

Hello, I would really love if someone may know an answer for me! I have been looking, and I believe my therapist is too. I am in my 20's, believed to be autistic (My testing is in a few days), and also likely CPTSD and/or PTSD that is not from the military or something similar. I am desperately trying to find someone that is in Colorado, or will not require me to leave the state (I am unable to right now), that trains Autism service dogs that can also help PTSD things. I found I believe two different places, but here is my biggest problem. I really want the dog to look "intimidating", like a German Shepherd. I know that is not a task. I have many that I will need them trained to do. I just know that there are already people who will come up to talk to and pet the dog, I have heard and seen the stories online with people dealing with that all over the place. I feel like it would be even worse if the dog looked "more friendly" like a Golden Retriever. I also feel like I will not feel as safe with such a friendly looking breed, again I promise I know this is not a task. I am trying to get my independence back. I am seeing a therapist, and whatnot. I just really do not want to possibly annoy who I may be living with by not being able to go anywhere without her. That is already going to be a problem. I want to make it as less of one as I can. I also absolutely do not trust myself to train the dog myself. I have no idea how I would do that successfully. I have zero faith in myself for that. I will definitely keep looking myself. I just wanted to add this here, just in case anyone knows of a place!