I am a first time mother of a 3yr old who has autism. And a single mother on top of it. So I know what it feels like to be crushed with the news that this child whom you EXPECTED to be neuro-typical is the opposite of that. But you have to look at it like Stephen Shore has described; they are like aliens from another planet, and you have been chosen to guide them through this world in which they do not understand. You have a gift, and our autistics are truly that. They do not see the world how we do, nor how we ever could.
As far as "researching"...stick to your gut feelings. Your child, although like many is autistic, yet an individual. What worked for one child may not work for yours. Trust me. I have tried everything I can think of (daily supplements, M-B12 injections, GF/CF and soy and yeast free diet, various prescribed medications, hyperbaric oxygen therapy and SO ON AND SO ON) when in all actuallity, the moment I quit, threw my hands up and quit, started treating her like an "normal" child, focused more on understanding HER instead of trying to make her understand ME and MY world, is the only time when I have made headway. My daughter will be 4 soon and is now able to understand receptive communication and say a few words in context. The main thing I need to tell you is to be PATIENT. PATIENCE is the key word in dealing with autistics. I wish you the best for you and your family.