HI, Gemma,

I'm sorry you got so little support for your decision to breastfeed last time, and really admire your resolve to give things a better go this time. The good news is, there is plenty of information at hand. A good place to start is http://www.bfar.org/. Diana's book "Defining your own success" is available from Mothers Direct http://www.mothersdirect.com.au/prod523.htm.
It is so hard to work out what can be attributed to circumstances around the birth and what can be attributed to the effects of the breast reduction. It's certainly encouraging that your milk came in.
It is important that you feed early and often to maximise your chances, and aquaint yourself with what is normal in newborns. For instance, you will expect your baby to lose up to 10% of her birthweight. This is normal - and not cause for giving formula. You will expect your milk to come in day 3 or 4. It's normal for the baby to have one wet nappy per day of life for the first 4 days.
It would be worth getting hold of Sue Cox's DVD "Mom and Baby I can do that" available from Mothers Direct and her other DVD- video "Mother and baby the first week"
Things must be busy for you at the moment, but I wonder if you would consider visiting a Lactation Consultant before your baby is born to go over what happened last time and identify what could be changed and improved?
It is hard to know whether you will be able to fully breastfeed, but many mothers are able to breastfeed successfully after a reduction

Warm Regards
Barb