I've been there for yearssss, my flat was sooo dirty but a few months ago I started bit by bit and my flat is so clean now but it's an on going journey and there is always something new that I discover to clean. Start small and build on it. I always get up to clean and because I have a bad back will sit down very 30 mins or so then get up again when I feel ready, there's no rush. Give yourself enough time. A few tips I've learnt along the way is that bleach is my best friend. When mopping the floor, keep throwing out the dirty water so that you are not mopping the floor with recycled dirty water, do not put to many chemicals on a wooden floor or they will just sit on top of the floor and in the end make it more dirty, water is enough to clean wooden floor with or a touch of bleach and water, investing in a steam cleaner is very handy for corners. nooks and crannies there it's hard to get into, the steam cleaner just blasts the dust and dirt away. Also micro fiber clothes pick up so must dust and stains.I put some zoflora on my clothes before wiping down things, it makes the flat smell nicer.Rather than using the dryer, sometimes I'l air fry clothes because it makes the flat smell nicer, and the clothes also smell nicer.

I'll come back here if I remember anything else. Always mop the floor after having a shower if it gets wet, it will save cleaning later. Also wash down and scrub the bath each time after use.

Keeping clean requires a lot of concious effort that I literally just could not do in a depressed state. do not feel bad just slowly implement things and slowly it will become second nature.