Get out of the house even if it’s just a walk around your immediate area. I used o have a shower with baby in the doorway so I could keep an eye (it was like a 5 minute shower).
I found meal prepping some stuff that could go in the microwave helpful - really simple stuff like couscous and prawns.
I think at 8 weeks I may have spent quite a bit of time watching tele as DD still liked sleeping ontop of me and wouldn’t tolerate a sling (you can listen to an audio book or podcast too if you are stuck under a baby).
If you feel overwhelmed, put the baby down somewhere safe and take 5 to calm down. (This was so important for me, to just step away sometimes).
Definitely do the bare minimum I did find prioritising a clean kitchen helped so dishwasher emptied either late at night or early morning so stuff could be chucked. I picked stuff up as I went from one room to another helped keep things vaguely tidy. Don’t bother ironing anything unless you need to, even baby stuff, I used to take stuff straight out of the dryer.
Unless your DH really can’t he needs to share some of the night stuff, so either on weekends if he has to sleep for work (driver, in charge of a nuclear power plant) or divide it up so he does up to midnight and you do after. Make sure you do this now, many a woman ends up in a pattern of being default night time parent, don’t let that happen.
It’s hard doing it by yourself, we did too and never having someone to just throw the baby at is immensely tiring. But you got this, it’s not easy but you will find a rhythm. I was terrified of being left with the baby alone, I’m not maternal, definitely had PND and really struggled with the adjustment. But DD survived and so did I.