Parent-to-parent is a great support service in NYS. Check out their link below:
https://parenttoparentnys.org/about-us/regional-office/
Suffolk Independent Living Organization (SILO)
https://www.siloinc.org/
SILO is Suffolk County’s only independent living center and has long had the reputation of providing the most comprehensive cross-disability related services to the disabled community. SILO empowers people with disabilities to take an active role in the community in which they live, work and play.
Long Island Advocacy Center
http://www.theliac.org/
The Long Island Advocacy Center can assist families as they navigate through Special Education services.