Welcome!!
Glad you are here! Many of us have been in the same situation you are in.
I all too often hear that taking care of the baby entitles her to half of everything because it is a job.
It doesn't sound like she takes care of the baby? It sounds like you do!
She must hit her bottom. You must get out of the way for that to happen
I found it helpful to read a lot about the disease in the beginning. "Marriage on the Rocks" is a good book and so are the "Getting Them Sober" series.
I would also give al-anon another try. Try to go to at least 6 meetings before you make up your mind if it is for you or not. Possibly try another meeting. You will find great support there. You my be able to hook up with another parent there and swap babysitting services.
Remember this is a disease. It is progressive. It gets worse. I didn't believe it when people on these boards told me that (I thought it was already really bad). BUT they were right. Things will happen that you could never imagine.
Take care of you and your little one
Keep posting!!!