Hi
Katie was in her moses basket (similar to bassinet) until about 4mo as she's quite small... we did it the other way around and transitioned for nights before we transitioned for naps, as Katie generally sleeps well at night but not so good for naps.
We also did the following:
- put the moses basket inside the cot for a few weeks (need only have been a few days I suspect) to get her used to sleeping in that room / in that part of the room
- put white sheets (pinned securely) over the side of the cot so that it looked more like the inside of a moses basket (one time I tried without and she spent the whole naptime looking at the exciting world outside the cot bars!)
- put rolled up blankets around her, including accross her head, so it would feel as secure as the moses basket. In fact we have not been able to remove the one accross the top of her head as she gets herself to sleep by cuddling up to it (!) - I think it reminds her of being in the moses basket.
No idea which if any of these things helped, but Katie managed the transition fine - and is now v happy in the cot.
HTH
Bryony