Thank you for sharing your situation with the Wefugee Community!
I closed the second thread you opened, as it contains the same issue. It will be easier and more transparent to keep your questions at one place - I hope it is okay for you.
I understand that you are in a very difficult situation. And it was already a good step that you recognized the paternity ("Vaterschaft") and made a declaration over the custody for the child ("Sorgerecht"). As there might be a possibility to apply for a regular residence permit, which is depending on many individual factors, I would highly recommend you to seek legal advice, i.e. in a counselling centre, as soon as possible. Please let us know, if you have difficulties in finding one in your area.
All the best,