hello i am hamayun masumi i am from Afghanistan and i teaching for special need kids for almost 6 years and now i am job less. i will give you the answer. first you should take care of the child and give him lots  of love and then u can start with him with colors and with blocks and then start with him with name of the colors one or two colors put week or month when he or she get to know the name to the color fast then start with him with ABC with sound try make it exciting for him when want to do the phoenix sound like A for aaaa B for bbbb or C for kkk like the child will get to learn very good and when he not Obeying you just don't talk with him and leave him and also when he cry for some thing don't give me do this for a month after a month he will not cry for that and will not bothering you that much he will be very quite kids i gantry you he will be very nice kids .
I hope that will be help full for you and i wish him all the best in his life and he will be very very happy kids in his life i pray That Great Full Allah (God) will be with him amine