Like most of us, most of your problems will be caused by owning too much stuff.
Think about it, we buy stuff all the time. The success of our entire (capitalist based) society depends on us buying stuff - it's drummed into us at every turn. But there is no similar outgoing mechanism, so we collect more and more stuff and our homes get filled up very quickly.
Add a couple of DC to this and things can get rapidly exponential.
We also get very attached to stuff and then we don't want to "waste things".
And all this stuff starts to make us feel claustrophobic and burdened and unhappy.
Reading books such as Marie Kondo (bonkers but essentially spot on about so many things)
The antidote, the cure, is stuff must go. You can organise your possessions all you want but still your mess/clutter etc will not be cured until you have less stuff.
Focus on making that mental leap - get that point, really really get it. THEN start shedding and stop buying.
Eventually you get to a place where everything has a place. So you have a place to keep tape - sellotape, masking tape, packaging tape etc. So instead of having 20 different lost rolls of tape, you have 3 rolls of the kind of tape you use, kept where you know you can find it. And when one roll runs out, you replace it.
Also aim for EVERYTHING, and I mean everything, having a "home" - it's own space in your home. If there is no space for an item to live then clearly the item has no place in your home and must go. This is common sense. Also, once everything has a place to live, clearing up is really quick as you as simply returning stuff to it's place. Once that has been done, cleaning is pretty quick and easy.
Moving forward own less - less clothes for the DC, less clothes for you. I have 2 pairs of jeans (work & gardening). I replace the work jeans when I need to, old work jeans become gardening jeans, 3rd pair get chucked. Bedclothes and towels - mostly I get the same bedclothes back on the bed the same day I wash them. I do keep a spare set for illness, but only one spare set per bed.
Scan paperwork - you don't need to keep many originals these days.
I'm a naturally messy person, but I have learned all of this over the last few years, and I have really dramatically improved the quality of our home in doing so. I have donated, given away or tossed many many many bags of items - it's a fantastic feeling. I still have the urge to buy - that is now (largely) kept in check by my awareness of it.
If you feel overwhelmed use the timer on your phone - set it for 15 or 20 minutes and get busy on something for that time. You can do anything for 20 minutes - and it is amazing what you can achieve in 20 minutes. I use this all the time -very effective.
makes lists of anything you want to buy and then WAIT. Usually you don't really want or need it and quickly lose interest. I bought something today I've wanted for over 6 months - I saw it in the shop, I knew I really did want/need it, it had a place to live, so I bought it. Otherwise, don't buy stuff.
"Do not buy storage containers/systems until you honestly get rid of everything you can."
^^^ THIS IS VITALLY IMPORTANT ADVICE!
You can do this.