I would recommend you to check out the lawyers listed on this site under "Hessen":
Especially the second ones sound really good for your case since the law firm is specialized on family matters as well.
If this doesn´t help you, another possibility is to contact the so called refugee council (Flüchtlingsrat) in Hessen and ask them for a recommendation for a good english speaking lawyer close to you. But keep in mind that they probably get a lot of e-mails or calls, so if they don´t answer quickly you can also go see a free counselling centre/office (or try it first with an email) - they can maybe give you a first impression on your legal situation as well and can for sure recommend you a good lawyer close to you. You can find one of these counselling centres/offices via this website:
I hope this helps and please don´t hesitate reaching out to the Wefugees Community if you have further questions!
All the best