My Lo currently sleeps in a RnP next to me at night. He is 6 wks. We have his crib set up in his nursery but I have not begun to have him sleep at all in it. When are others starting to use cribs? When is a good time to start sleep training? I want him transitioned prior to starting back to work but wasn't sure how soon was too early. I am staying out of work for 12 weeks.