Things that I found helpful...
I had an elective section too, and found it a great experience. For in hospital and the first couple of days afterwards, try the Frida disposable pants, the huge ones. No faffing around with mess, just straight off and in the bin. Totally not eco-friendly, but made a big difference by making it much easier to manage the post-partum mess.
Nuby RapidCool. I honestly can't say enough good things about this as it's one of the best things we bought! Better than a perfect prep, follows the official guidance for preparing formula, portable, easy to clean...
Breastfeeding made things easier for me but I know that's not the case for everyone.
I used a carrier with structured back support and found that much better than a fabric sling while I was recovering from the section.
Bouncy chairs/recliners are great to enable you to have little luxuries like a shower or a cup of coffee or even just going to the toilet without carrying a baby with you! Just watch and make sure the baby doesn't sleep unsupervised!
We found that splitting the night into shifts worked well. I'm a bit of a night owl, while DH is an early riser. So, I did all wake-ups for the first part of the night and DH did them all for the second part. It meant we could each get 3-4 hours sleep, which helped us survive!
Once you physically can, try to get out the house every day. A short walk can lift your mood and help your physical recovery too.
Ignore the judgey people. Some people will have something critical to say about any and every aspect of parenting. If they don't have anything constructive and supportive to say, ignore them.
Look into Huel. I credit this with keeping us going in the first 6 weeks.