One of the challenges you could face as an immigrant while studying in Germany is that of language. That is why we always advise our candidates to learn German, to be able to integrate into the society. This would also help you to able to interact with German students.  One other challenge you’ll face is when you’re trying to get an appartment. Sometimes, some property owners don’t like to rent their appartments to foreigners, most especially Africans but this depends on the city you are studying.