Hello and welcome to BW
I am kind of jealous you found the BW book before your LO arrives as I would have loved to have read it when I had all that TIME on my hands and wasn't so exhausted form looking after a new born!! On the other hand...as bec has said a little APOP (accidental parenting on purpose we call it) isn't the end of the world. A new born instinctively knows that the safest place is to be with mummy or daddy, you might find it hard to get LO down for any sleeps in the cot but don't beat yourself up about it. Every second you hold your baby you build the bond of trust, and that's the bond that you will strengthen every time you help your baby, cuddle your baby and be there when your baby calls for you. Ultimately it is that bond of trust which helps to teach a baby they are safe to go to sleep on their own because Mummy (or daddy) will always always come back when needed.
The BW books can sound quite serious about getting things right from day one - but the ethos of BW is also that you are *always* there for your baby when she needs you, those two things can sound a bit contradictory but just keep in mind that you are building the foundations of trust, the bond and as bec said it's not the end of the world if you APOP.
I believe Tracy would update her books if she was still with us as she updated some other aspects in light of more recent research. Therefore I'd go with having the cot in your room for at least the first 6 months and to have LO sleep for day time naps wherever you are too (eg in the family room in a bassinet or travel cot) as per the SIDS guidance.
I had my DS's baby hammock set up very close to my bed so that I could stay in bed and reach a hand out to pat or rock him, or just so he felt me there when he was very tiny.
I moved my DS into an adjoining room at 9 months old. To be honest I had 3 days of hell during that move. I had to switch him to the different room and to a new cot-bed and it was hard work for me and frustrating for him. However, I knew we would get back on track, 3 days of sleep disturbance feels like an awful long time when you are in the middle of it (and exhausted) but in the bigger scheme of things 3 days is nothing, he was an independent sleeper and just needed a few days of help to adjust to his new sleep environment.
As you are new to the BW book and about to welcome your LO to the world I'll also take this opportunity to mention that much of the breast feeding advice in the books is now out dated. If you plan to BF I'd suggest reading up on the most recent research about on-demand feeding, night feeds and such to give you the best start.
Looking forward to seeing you around the boards