Hi and welcome. If this one truly is a Yellow Shoulder Amazon, you are in luck. They are the parrot of choice in their native range of North Eastern Venezuela coastline area. Not as big as the "Hot 3" and not as feisty either. We love ours, Salty, to pieces and he is a total mamber of our family. He lives in the living/dinning room/kitchen with us, all jumbled together, and thats the way the majority of Amazons like to be, right in the middle of family life. Salty sings ( opera mostly), talks a lot, always adding new words and sounds, and knows oh say 30 or so tricks. He is our little boy. Any family would be blessed bringing a rescue Amazon into their home; if he is a Yellow Shoulder, doubly blessed. If he is 7 years old, he has passed his initial puberty/mating season or almost passed it. Thats when almost all parrots go a bit nuts, as hormones are raging and flushing thru their bodies. Its also the time when a lot of parrots get re-homed or abandoned, as people are not used to a flying can-opener with an attitude where previously their young parrot was still a cuddly baby or pre-adolescent lovebug. BTW Salty is 5 and he went thru puberty relatively easy. Amazons are so much easier to read their body language then a lot of other species/genus. If you study that thread really well ( hint, read it out loud to your Amazon in a soft welcoming voice) you'll be well informed and any biting should be easier to avoid.
Here is what is possible with an Amazon:
https://www.youtube.com/watch?v=EBUAsXLQFCo&t=332s