Can I do ferber's sleeping method for my 2 weeks old baby?

Let baby decide. At 2 weeks of age, your baby needs to decide its sleep/wake cycle. Its body will wake it up as often as it needs to in order to get adequate calorie intake over the course of the day. Don't try to force anyone else's schedule on the baby yet. Right now you need to follow his or her schedule, even if that means getting up every two hours all night long. He or she will sleep longer soon enough.