Unfortunately I only found your question not before today.
Which dojo did you try at last?
If you`ll be in Berlin again one day, please
which is lead by Clarissa Henke, 4th dan.
She is a very good teacher and gives
lessons in a female context.
The Dojo is in Lahnstraße 75 in Neukölln
(U-Bahn or S-Bahn possible).