Doesn't matter if you've been 'an idiot.' It's what you do now that matters.
Yes you'll go to debt collection easily, in the situation you've described.
From what you've said they're unlikely to give you a break unless you go through a debt charity - potentially screwing your credit in the process.
Situation with the adult offspring really should change and sadly people are correct that you'll struggle to get the assistance you need from debt help agencies once they realize you have two adults living there not paying their way, But it's your life, decisions, and choices, so if you're determined to not to charge them, then it's about getting more work fast.
I understand about avoiding care work.
I know you want admin work, (don't blame you) but if it isn't coming your way, consider night working for short term instant work to get out of financial trouble.
It might sound daunting, but honestly you get used to it fast.
Before disability stopped me, nighttime economy was my fallback, vacancies are frequent, and decent workers do well, especially English speakers tbh.
Unskilled generally pays between £12 - £16 ph (esp w/end shifts) for supermarket warehouse pickers, supermarket shelf fillers, parcel sorters, cleaners, fast food prep workers, etc.
Some of them you can easily pick up shift leader wages if you apply yourself.
Night pickers/palletizers/date checkers/stock takers working the chiller depts for supermarkets, airlines, ect is usually just under £20ph with 4 on 4 off - 6pm to 6am shifts for swift debt busting.
Semi skilled - Hotel night staff, Driving, Waking caretaker, Support workers, Concierge (basic - really night receptionist covering security) Petrol station cashiers, CCTV operators, range from £12 to £22 ph average. (*Often desperate and will take on anyone with common sense skills and English speaking)