There's lots you can do to help your situation (been there, done that).
Go to CMS about your ex, if he is working they will garnish his wages, if he isn't, you're no worse off.
Call stepchange, they can have a look at your debt situation and can work with the companies to get your payments reduced.
While you're looking for work ask the jobcentre about any grants you could be entitled to, to help with qualifications, you can do them from home a lot of time and this will help you find work.
Check Entitled To, make sure you're claiming everything you're supposed to.
If you are a carer for your child then some areas have a scheme where they will help you with driving lessons, it's worth having a look at to see if it's available in your area.
I'm not necessarily against SW, but it's clearly not making you feel good bout yourself which is affecting everything else in your life. You can't help anyone else if you're running on empty yourself 💐