There are community funded creches that should be available to you, so you can go back to school and have them minded.
Did you contact your local citizens advice bureau? they should be able to give you some pointers. Did you explain to Fas what you are trying to do? they should be able to offer you a few options, not just doing it at home.
It will be hard to study at home with 2 little ones to look after and would be great if you could go to classes and have some support.
HTH 🙂