thank you for sharing your question with the Wefugees Community.
Actually, what you lawyer has told you about the 19d, is possible when you finish your Ausbildung and you find a work in the same field, in which you have done your Ausbildung. Actually, in the new German Residence Act, there has not been any changes in section19d of it.
You are mixing section 25b of the residence Act of Germany with its section 19d. In fact, in case of having a minor child and having lived for 4 years legally in Germany, you can get a residence permit according to section 25b.
I hope, I could have answered your question. I am a MBEON consultant. If you wish to contact me directly, you can have a **** at my profile and follow the instructions there.