We ended up deciding not to assemble her bed for another month or so. The logic was that she already had to get used to the new room and she’s still just so little to be climbing in and out of bed. This way there won’t be any concern about her falling out of bed while we’re also dealing with newborn chaos.
So far she has spent 1 night, 2 naps, and has started the 2nd night in her new room/floor bed. We’ve put a pool noodle under the sheet so she can’t roll off, even though it wouldn’t hurt her from where she is. She seems to really like the room. We’ve been talking so much about big girl rooms and big girl beds that when I took her to lie her down last night she just grinned in a way that suggested ‘finally.’