This is a layered question because there are so many types of disabilities. (And so many personal preferences from disabled people.) However, I can help with the language I am fairly sure of, and share my own opinion as a disabled person myself.
Words to Use:
- physically disabled
- intellectually disabled
- autistic (not "person with autism" or "has autism")
- little people/little person
When in doubt, you can generally use "has _____" and insert the specific name of the disability you are referring to.
Feel free to ask me any specific questions you have (in the interest of not saying problematic things.)