I am in a similar situation. Good but old degree and ten years in a dead end, remote job which was convenient to be a full time parent but really not a great stepping stone to anything better
Months ago they made me redundant, and I am not surprised that my CV is getting me nowhere.
It's tough, particularly if you do not have lots of money and time to requalify.
But you can do it, I think.
It is hard to suggest anything specific, without knowing what kind of jobs you would ideally want.
In general terms, there are plenty of good courses out there which do not cost the earth. Things like Coursera and edx, must courses are from reputable universities and can be taken paying a flat monthly fee if 50 pounds or so.
In six months or less you could take a specialisation at 15 hours per week.
But you need to research well before committing, if you want results relatively fast.
There are also lots of free bootcamp a from the government. They are a minefield though, and you are only allowed to take one per year.
Essentially, the government is throwing hundred millions into funding them, to look like they are doing something. The idea is great but in truth there is no real vetting of training providers, or performance assessment.
Recently I have taken a the months course with something called netcom, which is subsidiary of apprentify. It was a joke, the tutor barely knew what she was supposed to teach, support to get you a job after was perfunctionary, and I am regretting burning my yearly chance for that. They got several hundred thousands pounds for that, really scandalous...
My partner is taking another funded course, with edx, and it is just they opposite. Really serious they have you work hard, the result is a good portfolio in line with what the business wants.
So, essentially, there are free courses but it is hard to find out which are worth your time. In my limited knowledge, anything Edx should be good. Anything netcom and apprentify, avoid.
Try and visit some job fairs. Quality is variable, but you find recruitment agencies and potential employers under the same roof. It can be a good way to discover about job opportunities you were not aware of, and to describe yourself and your qualifications, and ask what they would want on top of that to hire you. Then you can decide if it is feasible for you to get there, and how.
One way to think about it is, if I know what job I want, what is the kind of person who could get it relatively easily?
And then figure out how you could acquire skills to be that kind of person.
It's tough, but probably you can do it. It just feels overwhelming initially.
Good luck!