Access to this forum to ask questions and access to articles about training on this forum are both free. Youtube videos about training are also free. You have quite a few people on this forum who have experienced and overcome biting issues.. so feel free to ask questions and they can offer you advice.
viewtopic.php?f=11&t=1528viewtopic.php?f=11&t=227These articles would probably be very useful for you. They are long (I understand) but I think if you go through them and implement some of the techniques, you could develop a better relationship with the amazon that you have been posting about.
PS--For the one person bird article, just think of it as that your amazon has bonded with someone else (since it probably did) and follow some of the steps that I laid out in it.