Legal fees for stay at home mom

I have been a stay at home mother for my 2 year old child his entire life. I have been seperated from his father for a year. We are technically married. I have been cut off from all funds. I have been financially controlled and abused for 2 years. I need a divorce. Our relationship was very volatile and toxic. He is in the military and currently out of the country and has been for a year. He refuses to help me pay for anything divorce related or even anything for our child even though I have total guardianship of our son. I have no money. As a stay at home mom I cannot afford childcare without any help so I cannot work. I want out of this horrible situation and I want to ensure my child's safety and well-being. I want to be able to divorce my ex so that I can have custody of our child and get us both out of this abusive situation. Any amount of help would be appreciated more than anyone can understand. I just want to start a healthy life for my son and where I can financially get back on my feet so that I can be my best for myself and for my son.