So sorry, dear. Many years ago, I became a single parent with an 18 month old baby and no other source of support and I know how lost you must feel.
I did find a wonderful babysitter. She was a blessing in our life for years. She was only 23 when she walked through that door, but she was heaven sent.
I pray that you find someone like her, who will learn how to attend to your baby's needs at home, with conscientious care.
That is your first priority.
Keep your job to pay your bills.
And leave him to his consequences and recovery.
God bless.