I’ve been a housewife/husband 20 years and only have some O levels.

In care there are many part time roles which might suit you and use your skills gained from bringing up a family. Many care employers are more interested in the sort of person you are rather than the qualifications or experience you have. You can do the training you need whilst working. To work as a care worker most of your work is about directly supporting someone and so the IT you’ll need can be learned and isn’t the main part of the role.