We stayed two nights in the local MLU (had given birth at the CLU an hour away and transferred after 6 hours). So I had support whilst I was in there. Then the first night home we went back in at 2.30am for a feed because I had difficulty latching him when my milk came in. Over the next few days we went into the unit for a couple of feeds, and phoned them once in the night for another. They were absolutely first class.
I was panicky the first few nights that we were home because he would cry when I took him to bed even though we had just fed. And then I figured out that he still wanted to nurse. So then I was panicky that he would never be satisfied and I'd never get to sleep. But over the week my confidence grew and I learned that nursing always soothed him, and no matter how endless his feeds seemed, I managed to "just nurse him one more time" until he slept deeply enough to transfer him to bed.
My back up plan if he couldn't feed was to hand express and cup feed till he was calm enough to try again (I found it most difficult when he was really hungry for a feed and scrabbling against my very sensitive engorged chest) though I never needed to use it.
Things that I think help - don't try to artificially spread out the feeds - it was always more difficult as he got hungry and I got engorged. Try to offer as much as you can. Make sure you are informed about common problems, watch videos/look at photos of what a good latch looks like. Make sure you know where you can go and who you can call for support (don't let them discharge you without this info - and make sure you have a good few successful feeds under your belt first too) My Dsis's advice was to stay until after your milk has come in, and I didn't follow it - oops!
Ask someone to show you how to feed laying down. We did it once in hospital, but I didn't really get the hang of it for a while at home because I had problems with soreness - but once I did, it made a huge difference in terms of the amount of rest I got. We have a bedside cot which makes it so easy.
If you do end up giving formula at one feed because you are desperate, do try again to breast feed, it doesn't have to be all or nothing.
Once you get the hang of it, you may not want to stop, DS is 18 months now and still nursing :)