Building a Trust Based Relationship is needed whether the Parrot is hand raised or Parent raised as you are relatively new in your Parrots life and with all young one's they are going to push the boundaries.
The concept of not reacting while the Parrot is slowly chewing your arm or face off has alway confused me. This likely due to the reality that the response is a segment of a larger training tool. The complete tool includes setting the Parrot down, Stating No, no or No Bite, or like term. Then Turing your back to the Parrot and either stepping away or just standing there, back to the Parrot. This turning away is for about 1 minute and also part of the steps. Since Parrots have a very limited attention span, one needs to reengage after that minute.
It is important to understand that Parrots explore the world around them with their beak! With that reality in place, along with the above, one also want to insert Bite Pressure Training. Here, one accepts the need for the Parrot to test /explore surfaces including your skin, but control the amount of pressure then are using. This will allow for the Parrot to grab your finger as it is falling. Everyone is safe and no boundaries are cross.
Just a bit of confusion to the process...