Dear Mirco,
As I just said to another user, you may be interested in the association BBZ that offers refugees support related to the education system (information, consultation, help, etc.).
Please find attached the flyer (available in different languages)
Contact details:
BBZ
Beratungszentrum und Betreuungszentrum für junge Flüchtlinge und Migrant*innen
Turmstr. 72, 4. Etage
10551 Berlin
Tel.: 030. 66 64 07 20/23
E-Mail: mail@wegebbz.de
bbzberlin.de
All the best,
Karl