Go to the school and let them know you don’t have a job and that you are legally seperated. You can get on the free or reduced lunch program (I was on free lunch when I didn’t have a job.
You can get daycare assistance, food stamps, and medicaid while you look for a job or go to college.
You can also qualify for WIC.
Do all this on your own before you get in too much debt. I was too proud to get help where I could and went into debts with loans, don’t do the same thing. Use the available resources, it is not an easy process… but in the end it will help you get on your feet.