As I of course wants to help him in his progress, I try to teach him small melodies but the problem is that I cannot get him interested in the basics of playing. (...)
But, as soon as I try to get him going from the ABC of the piano, he gets mad and me and refuses to play more, begins to yell, tries to remove my hands from his piano so we don't get anywhere.
I hope I don't bore you .
It was written by an autistic person, I think....not quite sure.
And some things that comes very natural for him like remember a certain combination of figures is very difficult for us. That is because their brain does not know how to differ useless information from important.
Just because it doesn't seem like useful and meaningful information to somebody else, does not mean it is useless in general, and it certainly doesn't mean it is useless and meaningless to him.
We must alway keep in mind too that no matter how observant we are we probably are seeing 1/100th if not 1/1000th of what they are seeing.
The point is, no matter what, he needs to be treated like an individual and special attention to what works for him individually is going to be the key -- and, ultimately, that is true for everybody.