I have anxiety and on my bad weeks, I struggle with basic tasks, too, so I thought about how to make my life easier on those weeks.
I have a cleaner. It's an expense that I could do without sometimes, but I like having a clean house, which isn't always easy due to my working hours and having pets. I also have a robotic vacuum cleaner that mops.
I have reminders on my phone/Google calendar for which bins need to go out, appointments and things that I am likely to forget (I have a poor memory).
Someone comes to cut the grass (he does my neighbour's garden, too).
My washing machine is the biggest one that I could buy, so laundry consists of a dark load, 1-2 light loads (mainly due to bedding and towels), and a load of work clothes a week. I have a lot of pairs of socks, underwear and work clothes, as they make up the bulk of what I wear.
I do batch cooking on my weekends off, and either eat the same thing several days in a row, or freeze and defrost things. A slow cooker is handy for this, as is the dishwasher to deal with the glut of pots! It means that I get to eat healthy, nutritious food with minimal effort all week.
All of my bills and big payments are aligned to go out on pay-day, so that I know how much I will have left for the rest of the month.
'Big' food shops are delivered, and I have Amazon Subscribe and Save set up for other items like antihistamines, creams, pet items and so on.
'Slobby' clothes are kept to a minimum. I have pyjamas, work clothes and smart/casual clothes. Clothes are put out the night before.
Might 'smart' items work in your house? There are ones that run your bath for you, put the kettle on to boil, motion sensor lighting... whatever will help you.
As for self-care, it depends on how extreme you need/are willing to be! For me, it's permanent hair straightening (my hair never looks tidy or controlled otherwise) and laser hair removal (I love not having to think about whether I need to shave my legs, of it I've missed a bit, when wearing a dress/skirt). Other than that, I'm a low maintenance kind of person in the self-care stakes, but I have friends who also get their nails done so that they don't have to worry about their nails letting their appearance down, or just to cheer them up as that's one thing that they can see that looks nice to them!