It's very normal for them to be unsettled in the evenings and overnight, even if sleeping well during the day. Frankly, my daughter didn't sleep anywhere but in our arms for the first 6 weeks. We held her all day and then we did shifts at night where one of us was up while the other slept (my husband would wake me for feeds as I was bf at the time and then go back to sleep). He did 7pm-1am and I did 1-6am. We did that til 6 weeks when she was happy to sleep next to me (we had always planned to bedshare). Personally, in the evening, I wouldn't even bother putting a baby that little down. They like to be close to you so I would keep it that way. One of you can sit with baby while the other does bedtime and things around the house and/or sleeps. At night, being close to you, movement (rocking), vibration, and feeding while lying down next to you all worked for us. When we did start to put our daughter to sleep on her own (not being held or in the wrap) at 4 months, I would lie down next to her and feed her (a bottle at this point, with a slow teat so it didn't come out too fast) and she fell asleep easily like that. Eventually she grew out of it and would go to sleep more with a cuddle rather than fed to sleep, but that was closer to 6 months. I think try lots of different things and do whatever works.