congrats on your pregnancy, and its wonderful that you want to breastfeed
You hear a lot of horror stories about how hard it is and yes, it can be hard at times, but not all women struggle!
either way, though, its always worth persevering through the hard times. the important thing is getting yourself a good support network now. I really recommend going along to your local La Leche League meetings and start meeting some other breastfeeding mums who know what they are talking about. Theres a lot of rubbish talked about breastfeeding, and even the advice in the mainstream baby magazines is usually very very bad - they encourage women to use things like nipple shields (which, although useful in some situations, usually cause more problems than they solve) and to schedule feeds.
When it comes to breastfeeding, your baby will lead the way with regards to how long they want to feed, how often, etc etc. it is always best to feed on demand and you will get to know the subtle signs that your baby wants to feed as you get to know them. Crying is usually the very last sign!
whatever happens, dont stress about it now
i really cant recommend enough avoiding buying any bottles, formula, etc etc "just in case", theres no point. 99.9% of women are perfectly capable of producing enough milk for their babies and, thanks to incorrect information, a lot of women stop feeding because they think they havent got enough when really they have. Expressing can be useful later down the line, but again theres no point in rushing out and buying a pump now. you dont have to pump, all you need to breastfeed are your boobs! And to be honest, all of the sterilising and storing the milk correctly etc etc is such a hassle, its so much easier to just pop the baby onto the breast and have done with it! theres lots of other things daddy can do to help. Our little routine, when jack was little, was as follows: i would give jack his last feed before bedtime, and then my OH would take over and wind him and cuddle him until he fell asleep whilst i went straight to bed and got a couple of unbroken hours sleep, to fuel me for the night ahead.
A really good book to read is "The Womanly art of Breastfeeding", published by La Leche League international. It is full of information and encouragement and was compiled by mothers who have breastfed successfully, often through difficulty.
Whatever you do, dont put any pressure on yourself, okay? when i was pregnant with my son, and indeed for the first month or so of his life, i didnt think i would breastfeed past 6 months. My son weaned himself from the breast at 25 months. You really cant imagine how fantastic it is until youve done it. for the first 2-3 months of Jack's life, i didnt even really enjoy doing it that much, thanks to post natal depression and generally not bonding with him properly. but then we hit the 3 month mark and it just became SO easy, and so rewarding, and i couldnt ever imagine why we would stop!