Hey! Thanks for the replies.
Well, I guess I'll have to ask if I can give it a treat, because the people at the store still kinda act like the baby is still half theirs. I would probably talk to it and sit next to it, however there aren't any chairs in the store xD and its on a cage with 2 other birds, so I don't know how it will know I am talking to it individually :/
I would also like to leave the cage door open so it can come out on its own, however, there are other people's birds in there and they might fly out. I would also want to start introducing a clicker and target stick simply to familiarize it, but maybe it is too young? I would probably do that and try to target it to my hand so it can become comfortable around my hand. I guess most of it comes down to, if I bring it out, It'll try to fly around the store, and that'd be fine if it was in my OWN house

and I'll have to be standing up the entire time because if I sat somewhere I'd be in people's way. Plus If I tried doing training like that there I feel like everyone would be looking at me strangely xD Maybe I should just get over that though..