Re: I dont want to fail! Advise.
congratulations on your pregnancy, and you have come to the right place!
I highly recommend that you get a copy of "The Womanly Art of Breastfeeding" (about $14 on amazon) because it will give you so many basic answers. Now is the best time to read it, before baby is here. And then you can post questions here too. THis is also good reading:
Right now, think ahead to your first week and month with a new baby. Your primary job will be to feed that baby. So set up any way you can to not do other jobs during that time: cleaning, shopping, cooking, dishes, laundry - none of that should be you. Older kids - try to ensure you have someone else around to help look after them as much as possible, especially the first week - this all can be DH of course as long as he isn't at work, but the first month after a baby is the time to call in favors for meals and help around the house.
ETA: Also, is there a La Leche League meeting near you? It's really helpful to go while you're pregnant, to learn some stuff and to get some support networks started! You can even call your LLL leader from the hospital if you're having trouble.
Nursing, pumping, cloth-diapering, babywearing, working professor mama with the awesomest SAHD ever.