I remember preparing for the birth of my first child and knowing I was going to breastfeed. There wasn't any doubt about that. I went to the classes, learned all I could. Had books, a pump, a nursing pillow and 6 lactation consultants (LC). I thought I was prepared, but I wasn't prepared for everything.
They tell you, it will be hard at first and then Boom! your milk comes in and your breastfeeding. You will have more milk then you know what to do with it. Only a very few will need to supplement and even fewer won't be able to breastfeed at all.
That's not entirely true.