For me it was nothing like I ever imagined. There was nothing that I read that ever really described how I actually felt when she was born. That's not to say it was bad in the slightest, it was just so completely different to what I was expecting!
Be prepared to feel pretty weird for the first few days, chances are you won't have slept, labour really knocks you for six and then suddenly you have a tiny new person and it's all very bizarre. I was slightly bonkers for about two weeks after the birth, the hormones kicked in around Day 3 and the no sleep didn't help. Plus my body didn't feel like my own - my first shower after my milk came in made me bawl because my boobs were huge and rock hard and sore, and I was just sick of feeling completely alien to myself. Remember you're not actually losing your mind, it's just all new experiences and the feeling does pass.
With breastfeeding the best bit of advice I got was to completely go with the flow. If baby wants to feed constantly then don't panic that something is wrong, and try not to over think everything. I just concentrated on getting my dd established, some days she was on the boob for 6 hours straight, but because I didn't think anything of it I enjoyed it rather than working myself up into a frenzy. And don't believe anyone that says if they have a perfect latch it doesn't hurt. Dd latched brilliantly from day one and it was still bloody agony for 6 weeks. BUT, now we're established it's amazing and so so easy. Keep going if you can, it does get easier! But don't beat yourself up if you can't breastfeed for any reason, it doesn't make you a failure in any way.
Whatever you do is the right thing, because it's YOUR baby and your way is the right way! Don't let others make you feel insecure about your parenting choices or how you do certain things, learn to nod and smile and ignore.
In regards to sleep, the lack of it sucks. But you just somehow find a way to get through. And honestly, being woken up by your baby is nowhere near as bad as an alarm or someone else. My motherly instinct just took over, and even though I was completely shattered it just didn't bother me. Still doesn't and we're 10 weeks in now. Again, go with the flow, breastfed babies do wake a lot in the night, especially when they're getting your milk up, but it does get better. Definitely learn to feed lying down. Dd now goes consistently 5 hours in the night between feeds, so I feel human again.
Good luck, it's a wonderfully mad ride but without a doubt the best thing I've ever done 