Don't have a fixed notion of how you want labour to go, a birth plan is merely a wish list. You may end up in labour that is nothing like the relaxing waterbirth with minimum intervention you had hoped for and if you are ready for that, it will be easier to cope with any disappointment - which can be a factor in whether you develop post-natal depression.
Also, breastfeeding can be tricky, ask for help sooner rather than later. And if you have a CS, take it easy, and take whatever drugs they offer.
Oh, and all babies are different. Don't feel bad if your baby doesn't sleep as well as the next, it's nothing you are doing wrong.
Also, some babies do not go to sleep when they are tired, they get more and more distraught. They need forcing to sleep via rocking, feeding, driving around the block, whatever works. You are not making a rod for your own back, you are saving your sanity.