You should be due your six week check soon, raise how you are feeling with the our GP, or if you have a weigh in clinic, raise with your health visitor, you could have postal natal depression....hormones are right buggers, add in the sleepless nights, and overwhelming exhaustion it's not surprising you're feeling overwhelmed.
Do you have any family you could stay with for a bit, who'd be able to give you a bit of TLC, and maybe hold the baby long enough for you to nap?
As for advice:
You've just given birth, your body has had to move mountains, or at least a baby! Only do the very basics, don't feel guilty if you don't wash up immediately after having a cup of tea (which is probably cold and half drunk!).
Your baby doesn't need clean clothes every day, so don't bust a gut trying to get the laundry done.
Is your little one breast or formula fed? Either way, don't feel guilty for sitting down and feeding your baby if s/he is a 'slow' feeder, be cool with that, and try and enjoy that time, rather than seeing it as a chore.
If s/he cries a lot, and you know your baby isn't hungry or needs a nappy change, then give yourself permission to leave her in her cot, she's safe there, and babies, like adults, sometimes cry when they are tired. Crying for hours, then talk to your health visitor or doctor, to check there is nothing physical causing hours of crying.
Try and nap when he naps, again ditch the guilt. Remember to eat and drink, especially if you're breastfeeding.
Don't worry about hoovering, ironing or anything which requires any extra effort.
Money wise, talk to your health visitor, there maybe a benefit you are entitled to. Is the father paying maintenance? If not, once you're in a better place, look into this.
Can you get online deliveries? That might be easier for shopping, although I appreciate it tends to be more expensive.
Look at any groups going on, when mine were young our local church group did a weekly 'eat, meet and grow group', where lunch was provided in the church hall for all mums with babies and preschool children (you didn't have to be a Christian and there was no preaching or any signs of it being run by a religious group...other than being in the church hall). I know a number of groups stopped and never restarted after covid, but it's worth checking your local area.
You're allowed to not be enjoying being a parent, it's a hard slog, but it does get better, and it does get easier. I shudder at the early days, and have no wish to ever go back there. 
