Hi there.
Just wanted to stop by with some hugs and support. I start EASY when my DS was around 4 - 5 wks old. I agree with Ali with regards to not trying to make her fit into a fixed schedule. The routines in the BW books are guidance, BWing allows for LOs individual needs whilst at the same time not encouraging feeding to sleep and snacking etc, promoting a good sleep habit.
I didn't put DS in his own room, SIDS guides suggest having LO sleep where you, I know Tracy said to start them in their cot in their own room, but you don't have to follow absolutely everything to the letter (and I believe Tracy would have edited had she been able to, with the more recent information regarding SIDs etc). I put DS to sleep in a travel cot in the living room for naps and the first part of his night sleep, then fed and took up to bed when I went to bed. (at 10wks he refused to sleep in teh living room any more, being an independent sleeper already he chose that he would only sleep in his proper 'bed' upstairs - so I used a monitor then).
Personally I would continue with your 9pm BT for now, she is so young and has already settled into quite a good routine there. I believe 9pm to 3am is classes as STTN
so that's great! At that age mine was going to bed (in the travel cot) at around 7pm, fed again at 10pm and moved up to bed, then STTN to about 5am. At the 5am feed it was touch and go if he'd go back to sleep.
I also didn't wake to feed him, but he naturally clustered a little in the evenings anyway.
Like Ali said, encouraging EAS so they don't feed to sleep is the key thing.