Tips: I would extend the pjs/lounging on sofa/not doing much advice to 2 weeks . We were a bit extreme in that we refused visitors for those 2 weeks as well, but only cos our families are far away and would have come for hours.
If you're bfing, realise that that is your priority for those early weeks (at least 6) and farm out everything else if poss (cleaning, nappy changing, whatever). Babymoom: i.e. stay in bed/on sofa, lots of skin to skin contact and feed!
Re the babymoon thing, I found it helpful to think of the 1st 3 months as the last trimester - baby is still v small and needs lots of cuddles and reassurance. Don't worry about bad habits or routines, things will start to make more sense later on.
Accept all help. If no help offered, ask.
Oh, and involve your partner from the start. Get him to change nappies and develop his patent method of getting the baby to sleep/stop screaming. You will reap the rewards later on!