I would also say that the first 4 weeks MAY be a bit of a haze (well they will be) but you may feel down. Both times I've found the first 4 weeks quite challenging just because Im learning about a new human and their likes and dislikes, their patterns of sleep, eating etc. There's soooo much to find out. Of course this is also exciting, but dont expect pure joy the whole time. Also breastfeeding is a huge learning experience. If you're going to bf, just be prepared for some ups and downs.!!
Other than that, lots of rest after bub is born, let people help, and try to get out each day even just for a short walk. Fresh air does make a huge difference.
good luck xoxo