This post is all about trusted and knowledgeable websites about breastfeeding. I have been volunteering as a Breastfeeding Helper (kind like peer supporter but longer training) for over two and a half years and these are the sites I might recommend (order is random):
Hope it helps. Some of these sites are international, but the info is still evidence based. For information on extended breastfeeding, which means breastfeeding toddlers, I recommend La Leche League International.