The important things I learned in BF class was that BF takes Practice Perserverence and Patience
As long as you are determined to you will succeed. I was determined never to give my baby formula and she is 19 months and has never had it. We had some trouble in the beginning, but my determination got me through it.
Also important you have a good support system in place - people who won't just tell you to give up and give the baby formula. Always come back here. You may want to check out a meeting so you can have some IRL BF friends/support. Also the LC suggestion someone else made was great, most hospitals, if not all have them.
Also (forget if this was already mentioned) Try to get a copy of LLL's Womanly Art of breastfeeding. This is the Bible! It can be confusing if you are reading multiple things, BTDT - I think I read about 5 different books,but LLL"s was the best!