Need advice

Hello everyone!
My daughter was diagnosed ADHD about 2yrs ago. She is married on the papers only as far as her "DH" left her 18 months ago and they didn't live together since that moment. Soon after the separation she met a wonderful man who was really supportive to her and they slowly started dating. However her so-called marriage is a great obstacle towards her future personal life. She contacted her ex to get divorced, he said he would agree to everything, but he is not gonna file for it and she has to proceed with the divorce by herself. That's for sure that she is not gonna cope with it by herself and I am not gonne leave her, but y legal training is far beyond from perfection. I have googled for divorce forms  however don't have a clue how to file them. Maybe somebody has been through this? Any help would be appreciated.