Hi, Soutine. I don't know how a first elective section affects you after you've had normal deliveries - I have had 4 electives and no vaginals so my experience is different - but for me the worst thing, always, was getting out of bed the first time - especially after an epidural because you have that lovely long lull with no feeling at all. (One of mine was under GA.)
The pulling sensation across the scar is quite scary when you first get up but after that it's not nearly so bad. The bloating/trapped wind didn't bother me but the nurses always mithered on about moving your bowels - which you will do eventually, so if you haven't I would recommend lying about it, otherwise they might make you have an enema (eurgggghhhhhh). Hospital food didn't offer much fibre back then (my youngest is 10), probably better now, anyway try to get wholemeal bread, bananas, apples etc where you can, and as PamT said move about - gently - as much as you can.
It seemed to me that I didn't bleed afterwards nearly as much as the normal deliveries - I think they must hoover you out before they stitch you up.
I did have that "quick and uneventful recovery" described by Marina (but I always have been a quick healer and have very clotty blood) but the major problem I had with my babies after sections was breastfeeding. If you don't plan to then it won't matter, but electives tend to be early and not quite ready to be born so don't have the major survival/sucking reflex that term babies have. You don't give the reason for your elective (breach or something?) but if you can, get them to leave it as late as possible so the baby is as near as it can be to term. (I also had milk supply problems though so it wasn't just the earliness.)
Having full-time help for a bit is an excellent idea. My kids were a minimum of 3 years apart, not 18 months like yours, and getting everybody organised and out of the house used to defeat me on a regular basis for the first few weeks - especially with the unsucky babies who wanted to be fed a small amount every 5 minutes! - with help you can send the older ones out and concentrate on the new one without them feeling a nuisance or you feeling hysterical.
Incidentally all the medical people in theatre were brilliant for me, despite no previous contact as mentioned by Marina, in fact I particularly remember the (German, training) anaesthetist I had with no. 3 who was as involved as we were and delighted in pointing out the effects on my heartrate of different parts of the op - as the baby was delivered it practically doubled, he was thrilled!
Lots of luck!