Why not go ahead and commit to this degree. If you find it's not accredited or useful the knowledge isn't something that will ever be useless. I would go ahead and learn as much as possible.
You can always do a minor in a closely related field. If the autism degree ends up not being viable you can use the minor as your field of preference and head towards a masters in something there.
I have a AA in Psychology then went to university. I studied Psychology until I realized that Sociology had less math requirements and that I could easily add a couple (2-3) social work classes and have a minor in SW. At that time I was considering an MSW. It's a better degree than most other social sciences masters because it's a national degree, you don't have to go through any other classes or certifications if you move over state lines or have clients from out of state. It also has 3rd party payment rights.
If you stay in one college at university any classes you take will apply towards just about any degree that college offers.
Now that would not be true if you were studying something in CEAT like Architecture or engineering. That would require a lot of different specific classes.
But in an Arts and Sciences college or college of education almost all classes would cross over for various degrees. If you decided to go to a totally different program in another college then you'd have issues.
So go for the program that is interesting. You can always change your mind or find something more challenging during these next few years.
My friend has a son who has autism. His outlook for life is sheltered workshop once he works his way through the waiting list, full time adult day care, or staying at home a few hours by himself during the day while his mom goes to school meetings, picks up kids, take kids to after school activities, etc....he doesn't have much of life to look forward to.
When I went to college I had several years in the field working with adults with Developmental Disabilities. I knew I wanted to work in that field. I knew I'd love to be able to help more people by helping get better laws for their rights. I wanted to be a lobbyist and go for it. To get rid of institutions, get money for small family style group homes, and make their environments the least restrictive they could manage.
I wasn't able to finish my degree by each and every class that I took contributed to something. I didn't waste any time learning anything. I use all that knowledge to this day.