OP do you want tips on how to stay on top of things?
A ruthless declutter may help you stay on top of things.
For example if staying on top of the dishes is an issue, can you box up most of the kitchen? Leave the absolute bare minimum - one plate, bowl , knife, fork, spoon, glass each. Some cooking equipment and a few containers etc. That way you will be forced to wash up regularly after every meal and it won't become overwhelming.
A good tip I got off here is to buy one of those sponges on a stick that can be filled with washing up detergent. Keep it in shower filled with 50/50 vinegar and washing up detergent. Use it to scrub the shower when you are in there. It will help to keep grime down. Doesn't need to be done every day but once or twice a week can help.
Another idea that may help is to gather all the clutter lying around the house that you don't know what to do with, shove it in a laundry basket and put it in cupboard to deal with when you can face it. At least it will give a temporary reprieve from the mess. Just don't be like me and forget about it all together.
I'm very familiar with how mental health issues can impact on the ability to function and stay on top of things.
I really feel for you.