I was first in my family to breastfeed too. After a dodgy start with ds1, I just loved feeding my own babies; I felt sooo proud of myself! Good luck to you 
Lots of good advice here!
Arm yourself with facts, and good support.
From my experience of feeding 3 babies: a good latch is essential, and if at all possible, find someone (midwife, hv, breastfeeding counsellor) to show you how to position yourself and the baby., and latch successfully. I was naive with ds1 and vaguely thought the baby would immediately, instinctively and naturally latch on somehow from birth, and off we'd go. Hmmmm. Not here. The babies all tried to latch on instinctively, but I had to teach them how to do this effectively. It's a learning process for both of you, hence the need for a good teacher.
Babies demand feed, and will have times when they need to increase your milk flow by feeding what feels like non stop for 2-4 days. This is healthy and normal. They're going through a growth spurt and need more milk. FWIW, all mine did this a lot during first 4 weeks,then again around 6-7 weeks, and again around 3 months.
Also, I co slept with my babies which helped a lot. I wasn't ever tired because night feeds were pretty sleepy affairs for both of us, and I always felt rested in the morning. 'Three in a Bed' by Deborah Tannen (i think that's her name) was recommended to me by my hv, and gave me masses of practical info about co-sleeping, and lots of info about why this is a great thing to do with your newborn. I can't recommend this enough!
Congrats on your decision; as I said, I loved feeding my babies; I felt very happy and proud!