Hi and welcome
There are a lot of "bird smart' people on this forum that will help you along. The bird that you have is a very intelligent creature. If he does'nt already, he will talk, whistle, imitate sounds and can be trained to do most anything...but it takes time, not force. Don't forget, as tame as parrots can be, they are still wild animals and are capable of still carrying-on that way.
As far as the bites go, yes they are very painful and can be very severe. Do you use a glove on your hand when you approach? It may help. When a parrot bites, he either wants you to go away. If he is even kinda tame, and he bites, usually the owner first, seldom a stranger, it is that he knows that you will take him away from an uncomfortable situation. In other words, if I bite you, we are outta here! In the near handling time, keep fingers away, esp. children's, and use your hand and not just a finger. Good luck
pirategene and tambo

9yo blue & gold macaw
ps Not to start a flood here...but let Frankie

on your shoulder!!