Scared Petshop Cockatiel

Hey!

I just got a Cockatiel from the pet shop that no one apperantly wanted (Due to him being a little older and apperantly not as desireable in coloring). His health is fine (the pet shop is also part vet, so they check on their animals and provide free health check w purchase). I decided to purchase him, because my partner and I fell in love instantly.

It's been soo long since I had a bird from a pet shop, and I am worrying sick because he is VERY uncomfortable at the time being. He keeps pacing back and fourth in his cage and Im scared he will injure himself somehow when he jumps/flaps around.

Any advice on keeping him calm? I dont have a huge apartment, so space is kind of a problem, but I try my best to give him as much space as possible and try not to scare him with quick movements etc.

It may be a silly question, but its been a while since last time I had a untamed bird, and considering he has been stuck in the petshop for a while he lacks a lot of experience with humans.

Thanks for any advice!!