Ok, you asked for help....
Straight out of uni,
you are able to do almost a nothing, granted.
Moreover if you want to be consulted,
the customers can't be forced to speak english just because you don't understand their language..
So if you can go in some german uni / simple work for a bit,
and in the mean time you practice the language,
otherwise...
try to improve it on your own before ever thinking to look for that kind of job there
Bye