A V shaped cushion (John Lewis do a perfect one) is very helpful for propping you up afterwards. A small soft cushion to protect your scar is a good idea - I just used a long one from IKEA, which turned out to be ideal for plonking DS on.
Another must have is a large water bottle with a flip top, or sports cap type top (that goes for all BF-ers, C section or not). Basically one you can leave on its side on a bed without leaking. You get so thirsty BF-ing, and if you find it hard to get out of bed or lean and reach etc, then it's so helpful to have one large bottle to hand next to you. Really important for hospital, where (a) the cups are the size of thimbles, and (b) you don't want to have to flag down a busy MW everytime you want a drink.
I BF-ed fine after my elective CS. Remember that generalising about how hard it is to BF after a Csection doesn't take into account the difference between emergency C sections, where there is often a poorly baby, or a baby in distress, and electives, where the baby is well at birth. A baby that is born with difficulties will have a harder start BF-ing, especially if they spend time in a SCBU, not on top of their mum to start with. There's no reason that should be the case for you, if your baby is expected to be well.
And with an elective C section, you won't be exhausted after a long labour when your baby arrives and needs feeding. I felt I had a huge advantage there over friends who'd had emergency CS's AND long labours and instrumental deliveries.
Get skin to skin contact as soon as you can after the op. Some women get that in the operating theatre - I had it in the recovery room, so about 15 mins after DS was born. I just stuffed him down the front of my gown and kept him there as much as possible. It's where your DC will want to be, and keeping them right next to your boobs is the best thing you can do.
I made sure I squeezed my nipple to get a little colostrum out, plonked DS on my boob (I was semi reclining in the hospital bed), and rubbed it on his lips. This seemed to perk him up, he started rooting and head bobbing, so I waited til his mouth opened, got a good mouthful of nipple and aureole in, and he got on with it.
I think keeping him with me a lot really helped, with hindsight. It sounds obvious, but MWs kept offering to put him in his cot, and I said no because I couldn't, in the first 24 hours, get him out myself. He spent so much time on me, feeding whenever I waved a boob under his nose, he got the hang of it better than if he'd been on and off me, IYSWIM. I think the more a baby is away from you, the more it sets up the expectation of distinct 'feeds' - people offer to bring you the baby for a feed, and then take them away when they are done. And most newborns want to feed so little but so frequently, I don't think that helps. They'd be on and off you like a yo-yo if you truly worked round 'feeds' in the first few days!
There was much talk of rugby ball holds and feeding lying down as well, and I never managed either of them. I'd love to feed lying down, but found it knackered my back and I was much better off sitting up. So just do whatever is comfortable for you and works. I really worried about the rugby ball hold for days - no need.