Feeling down

My baby is 17 days old and in abt 2 weeks time my nanny will be leaving and I will be taking care of my own baby. I don't even know the basics of carrying my baby and just learning now. It doesn't help that my nanny always say if I do this to my baby I will break his arm etc. (She showing me) Ask her to show me how she shower baby she says 我学不到的。I don't have in laws or parents to help too. My husband is helping to take care of baby too but when he goes to work I am all alone. I want to be confident to take care of my baby but it is demoralising. Also baby is now more attached to nanny. When I hear my baby cries my heart feels frustrated.