Your question is unfortunately too complex to be able to answer it seriously online. Therefore, if you live in Berlin, I would like to ask you to come for a personal consultation in our welcome center Berlin, Potsdamer Str. 65, 10785 Berlin. Our opening hours are:
Mon, Tue and Thu: 9.00 - 13.00
and Thu.: 15.00 - 18.00
The waiting numbers are issued approx. 45 minutes before the opening time.
If you do not live in Berlin, you should contact an advice centre at your place of residence.