I reckon everything seems so insurmountable at the moment, and that's normal, when you are looking at the big picture
You need to think about what your final outcome goal is then break it down into steps that are manageable
Its not going to be easy, it really isnt, you may find yourself on benefits and living in a B&B, relying on food banks - only you know if you are prepared to do that to escape a marriage
( when I left my husband I lived in a hostel , with £46 a week unemployment benefit , was worth it , but I didn't have children )
Do you have any family support? Parents? siblings? Grandparents who can house you?
No qualifications doesn't exclude you from the job market. There's NMW jobs out there and as a parent you will more than likely be able to claim UC to top up . You are a mother, you have employable skills. You have something to offer. No shame in NMW jobs, gets you on the ladder, gives you breathing space and allows you to hone skills to move up, find out what direction you want to go, get the qualifications needed
Your husband is a dick. He's abusing you. Speak to women's aid, they will help you get the help you need and signpost you to the benefits that are available to you during this transition period
Have faith and belief in yourself.