Are you being unduly harsh on yourself here?
My first question would always be - what has worked in the past?
I've personally been round the merry-go-round and can honestly say I have never managed to achieve a time when I am my goal weight, exercising well, work is going well, friends and family are healthy, home is tidy.
Genuinely, if I ever think to myself for too long - wow I have smashed this, something happens to derail things.
So there is something in the mindset of wanting perfection that is doomed.
However what I think from years of experience is the sweet spot is 80% good enough.
To get what you want you just need to pare everything right back and simplify your life so you are removing as many obstacles to success as possible. If you genuinely Want those 4 things listed at an 80% perfection level, get rid of obstacles first.
Exercise > build it around things you are doing anyway, around existing routine, make it something you enjoy as more likely to stick, start small and build up
Eat healthy food > remove junk at home and replace with healthier options, meal prep so not caught out etc.
Organise home > follow some declutters online for inspiration, possibly invest in their services if you have too much stuff
Lose 2 stone > this one is a by product of exercise and healthy food so takes care of itself with the right action but the main obstacles is sticking to it, so just track everything you eat
All of these individually take a fair amount of planning. I tend to start with healthy eating when I've lost my way because after a couple of weeks of healthy eating I tend to feel okay about exercising.
At the moment my focus is on
Healthy eating
Work going well
Checking in on friends and family
Exercise is on the back burner (but not forgotten) with walking only as I am a bit poorly with a virus
I tend to do decluttering at home in short projects - but don't enjoy doing it in summer, more of a winter thing - would love to finally get rid of the 'things to sell' pile(s)