Not advisable as it might affect your baby’s breathing. Your baby is too young and the neck doesn’t have strength yet. She needs to be able to lift her head first.
If you have your eyes on baby all the time, and are within reach of baby. Also ensure the neck is not too flexed, which can press on the airway
Better not to. It's not good for the posture.
Prob fr 3 mths
Better not