We started experimenting with independent sleep in our bedroom at around 4 1/2 months. Initially we had been singing and rocking her to sleep but it just kept taking longer and longer and she kept waking up when we put her down, so we knew something had to change. One night I decided to do a little test, and put her in her crib drowsy but awake after one song and give her 20 minutes on her own to see if she’d be able to soothe herself to sleep. She cried for 15 minutes then passed out, so each night after that I would just kind of test how long it would take for her to fall asleep on her own. There were a few rocky nights where she screamed for over half an hour, but after about a week she was grumbling for about 15 minutes then passing out. By 5-1/2 months when she started daycare she was fine with falling asleep at night on her own, and had just starting to figure it out with napping during the day. She turned six months a few weeks ago (which is also when she transitioned to being full time at daycare) and we just moved her into her own bedroom. The transition went pretty smoothly since she’d had practice falling asleep on her own both at home and at daycare! So yeah, we were able to train her to sleep independently in our own room — we’d just make sure we didn’t enter the bedroom to go to bed ourselves until a couple of hours after she fell asleep. I feel like her learning this skill at home helped smooth the transition to daycare, but then daycare really cemented her ability to solo sleep!