Need help don't no who to talk to

Hi my son (4) was told in July he had ASD at the time of being told my mind just went blank and I cry. But since July I've had the paper work but feel we have been dump now. I don't no who or if I can call to find out if I'm doing right from wrong by him . I don't no anyone with child in the same needs so I feel

im very in the dark. He is now in full time school and they have only just sorted him action plan witch I've had to ask for a copy . I have loads of questions I need answering but don't no who where or how to go bout getting the answers x