When bringing a kitten home, it's best to confine it to a bedroom or bathroom for at least a week, perhaps a month depending on the situation. It lets them acclimate to the major life change, and have safety of a small space to explore. Put a blanket, cat bed, scratching post, couple toys. Spend time with them in the room, playing and petting and letting them acclimate to you. (That room will likely remain a 'home base' or 'safe space' for the cat the rest of his or her life.)
After they're comfortable with you and the space, open the room and let them start exploring. But you can return them to the room at night to sleep for the first few weeks or month.
After they're comfortable with you and the space, open the room and let them start exploring. But you can return them to the room at night to sleep for the first few weeks or month.