How will I manage as an older single person once kids have left

[Dogmam9273]

I'm currently married with two teens. Wanting to separate but have felt trapped financially and with the kids as I couldn't have provided for them if i was single as I earn minimum wage, husband a high earner.
Very soon I will file for divorce, won't get any money out of it as we have hardly any savings but i will be able to buy a small apartment /house outright so will be mortgage free.
I work full time on minimum wage, can't see this ever changing, if anything i need to work less. I have chronic painful conditions , depression and anxiety (although that may go away once apart from husband) I have 2 elderly parents that I will be caring for as I'm an only child.
I know I can claim UC whilst children are with me /in education but what about when they are adults?
My income is £1500 which won't cover my outgoings or enable me to live any kind of life that I desperately crave. I feel so trapped and can't see a way out of my situation.
How do older single people manage financially? Especially if they have health conditions?

working full time 37 hours per week you should be taking home £1614 per month

If you have purchased a home outright after your divorce, then you'll have minimum bills to upkeep the property and if you are wise and have a smallish newish 2 bed youre utility bills and council tax should be minimum £150 for a council tax on a 2 bed property would be high and then £100 for gas and electric if you have a highly insulated newish build, water at £40 per month and a phone and tv at £50, running a car would possibly be more expensive but if you can get a run around the is economical to run you should be able to keep your bills under £450 per month

leaving you £1,164 disposable income

Your husbands a high earner but there are no savings? Where does the money go?

You need to ensure you get half of all assets including his pension. You may also be entitled to alimony payments.

I recommend you see a lawyer.

If I didn’t have a mortgage my monthly outgoings (just my share) would be just over £1000. And that’s with a new car.

I don’t see how £1500 isn’t enough, you said the kids will be grown up so you won’t be paying for them.