2 year old, just adopted 2 month old. Help!?

it could take up to a couple weeks for her to use to it, having her sister their will be a big help though. Just be careful what daycare u send them too cause i dont trust any of them. Ive worked at one and seen the way teachers acted so nice and innocent in front of the parents and after they leave, jerk the kid up and sit him in the room.