I found I was so focused on labour, I didn't have a clue about the 'immediately after' and wish I'd known more about that, because once labour starts then you're kind of on your way towards one goal, regardless of route.
So once you've reached your destination! Some silly things I wish I'd known/been told/had explained, some of these are stupid but I was so confused and tired:
Your milk will come in even if you don't get the colostrum out in the first few days. A pump will quite likely work fine from this point if breastfeeding isn't 100% successful.
Hand expressing colostrum is do-able, and you're only supposed to get out TINY drops! I was expecting like, a bit of a bottle full and started getting really upset! Then two weeks later I realised, oh... colostrum is literally a tiny amount for a tiny stomach!
Any breastmilk is good (1 day, 2 weeks, to 6 months or further!), but don't feel awful it if it's not for you. (I live in a very pro-BM area with fab stats for it, but it ended up contributing to my near-PND as I felt no professional would discuss FF with me AT ALL and I was terrified of getting it wrong and finding BF too emotionally turbulent. Was hurriedly given a scabby photocopied FF booklet on dismissal, with a 'well as you're bottle feeding you'll need this...', and no further conversation! Made me feel f'ing hideous).
They might not read your birth plan - you might need to be vocal, especially if you go to theatre and there's something important to your beliefs/anxieties.
The theatre team may be very different to the standard labour team. There should be at least one familiar face there though! Be vocal again about them staying near you if you're anxious.
You won't necessarily feel the need to sleep (hormones/adrenaline) but your birth partner/s will! Worth sending them to get some sleep whilst you ride out your new baby high. You'll need them when reality sets in and midwives are very happy to help immediately new mums.
Remember to feed your baby! Especially if it's a night birth - again a stupid thing, but I just thought, oh it's 2am time for sleep! Newborns will sleep... but you might want to wake them and try feeding before 9am!!! (whoops...)
If you want skin to skin but then end up going to theatre, don't let the midwives persuade you to dress the baby once you return. It's always warm enough on the post-natal ward to do some more skin time!
You might feel horribly sad and depressed quite soon, and for a few days. This doesn't mean you'll get PND for sure! Hormones can be bloody strong and your brain might be a bit sensitive to their presence/sudden change of them.
Hope this helps! Wish I'd known. x