Firstly you are niether naive or stupid, many moms fall into that trap.
Secondly I agree you should wait untill you are fully able to commit, but I would also tell you to have your DH do PU/PD NOT you. Reason being that he doesn't have breastmilk. Your LO is used to you nurseing to sleep and that takes time to brake. If you try to do it it'll be a LOT harder since she'll smell your bm and want to nurse and get very upset when she can't. If dad does it then there is no bm to offer.
I even would go so far as to say go stay somewhere else at night (come back for days to feed regularly, and take older DD with you, spend quality time just you and her) so you are not tempted to BF.
If your DH is willing to tackle this in 3-7 days you can have these wakings to 1 or less when done right. We can walk your DH through it if need be.
Remember though this isn't an overnight fix, its a lot of work. However it really works.
