Well, this was my dilemmaIf you have the choice, maybe better to give treats and not pick them up
When they know you better, a light tapping on their beak (like you're a friend cleaning food off their beak), a bum-bum fluffing, or a light crop rub may be appreciated. Depends on the bird, but most of ours love those things.
Congratulations on your new friends!!! That's so exciting.

(I won this round!)