Hello there and welcome to the forum! 
Give him plenty of time and space to settle into his new environment. Don't let him out of the cage yet. I would advise to cover his cage at night and set up a soft night-light near his cage to prevent any night frights. Keep noise to a minimum. The pacing back and forth is actually not a negative thing, I would rather see a new bird doing that instead of sitting fluffed up and scared at the bottom of the cage.
What is his diet like? Be sure to feed him exactly what he was being fed at the pet store while he is adjusting to his new home, and in a couple of weeks' time you can start to introduce new foods.
Give him plenty of time and space to settle into his new environment. Don't let him out of the cage yet. I would advise to cover his cage at night and set up a soft night-light near his cage to prevent any night frights. Keep noise to a minimum. The pacing back and forth is actually not a negative thing, I would rather see a new bird doing that instead of sitting fluffed up and scared at the bottom of the cage.
What is his diet like? Be sure to feed him exactly what he was being fed at the pet store while he is adjusting to his new home, and in a couple of weeks' time you can start to introduce new foods.
