Just to say that sometimes the heavy pushing of co-sleeping on a thread can be unhelpful when someone's looking for advice, particularly the near guilt-tripping about "cold cribs". There are lots of reasons why some people aren't able to co-sleep.
My DS was premature, so co-sleeping wasn't a safe option for us. DH worked away during the week so sleeping in shifts wasn't possible after pat leave ended, and we had to get him to sleep alone. I would use a gro swaddle to swaddle him safely. I found them easier to use, there was no concern about his hips with that design, and we'd swaddle him with his hands up near his face so he could get to them for comfort/get his arms out if too hot but his Moro reflex wouldn't wake him (particularly in the early days when he was very jittery). We used to hold him until he fell asleep, then gently transfer him into a Moses basket that had been warmed by a hot water bottle (removing the hot water bottle first), then sit with hands on his chest and tummy or legs, rocking him very gently if he stirred. I also started wearing lavender on my pulse points when I was holding him or feeding him, and we put a tiny amount on the fabric around his Moses basket (nowhere that could touch his skin) and used an aromatherapy diffuser with a tiny bit of lavender in it at night. We did have a Next2Me crib, but he hated it for the first 4 months, I think he found it too vast and felt a bit marooned in it, whereas the Moses basket was more snug, although I did place the basket right next to my side of the bed so was always very close to him. He'd sleep for 3 hour stretches in the early days once he grew used to the Moses basket. Then around 4 months he started waking every 45 minutes during the 4 month sleep regression (that lasted 4 months!!) and I co-slept part of the night with him from around 6 months onwards as it felt safer to do so and he was big and pretty robust by that stage.
I found routine really important (as much as it can be with a newborn!) The nurses in the neonatal unit really stressed its importance, so we always did a bath, a story, feed, and bed, from the day we got home. It seemed mad at the time, but I do think it helped establish sleep cues, and he's now an 18 month old who has slept exceptionally well from about 10 months on.
Good luck OP, the early days can be so tough but you will get there.