The main thing is to move slowly and do not expect too much of him until he is completely at ease in his new surroundings. I like to read to new birds. Children's books with a few words on each page work well. Read and reread the same stories to him and he will soon become acquainted with the sounds of human language.
Amazons learn the majority of their vocabulary between 1 year and until they become sexually mature. That does not mean they won't learn any more, it is just that they learn quicker and more during that time.
When the bird begins to take food treats from your hand and eats them in front of you, it is time to start on handling. A bird that has any reservation about his new people or surroundings will drop the food to the floor if given any by hand. That means he still feels he must keep all his senses in tune for flight if the occasion arises.
Once he is taking food regularly from your hand you can lure him onto your arm by holding a treat so that he has to step onto your arm to get it. Do not move your arm at first. Only when he is completely confident on stepping onto your arm should you try to move it when he steps onto it.
Take your time in training. Amazons live for a long time so there is no need to rush them.
Joanie Doss
The Amazing Amazons
http://www.parrothouse.com/bodylanguage.html