My baby 1month 20days old My baby often turns to smiling faces and sometimes only smiles once

A. Smiling is very natural for a child but this is not for you right now that is going to happen after three months when they can give a social is file to other people currently it’s your child’s on wish that the child is doing but I do not understand anything at least for initial three months are in terms of face gestures and all because I do not have a clear vision