I felt very much like you, and at the age of 58 started my own business which I still do.
It does not take much to work for oneself, and then the CV can be binned!!!
My hobby was genealogy, and I now work as a genealogist and have completed around 800 bespoke projects of all sizes. Presentation is everything, and people will pay for something that is bespoke.
To consider working in FE you must have subject that you are skilled in. Consider self employment as a home tutor or similar. If you are fit and reasonably well, offer your services as a dog walker/PA/Driver.
My recent life experience involves my partner becoming very ill, and needing help, and I discovered there are people who work as PA's not in the empire building sense. They are self employed and offer services as drivers/shoppers/ companions/enablers on a paid hourly rate of about £15-£20 plus petrol. They can pick and choose their jobs. Their overheads, apart from their vehicle, is simply advertising in appropriate places - they need an enhanced CRB, and public liability insurance ( which is not expensive in my experience).
If you want real interest in your life - something that does not pay, other than free board, how about holidays as a 'house sitter'. I have a cousin from Canada who wanted to see the UK and she spent 6 months last autumn/winter house sitting all over the UK and will be doing it again this year.
I am a terrible employee - I have tried it and I do not like the attitude employers have - so I work for myself. Give it a go, it's not as hard as you might think, and if you do make a mistake, you just have yourself to tell off, not someone else belittling you.
Working for yourself will build your self esteem and feeling of doing something worthwhile..... it's just a thought, but give it some thought. Good Luck