The Germans are rumoured to be many things; they are a nation of poets and thinkers, but also very bureaucratic. They love organisation, are hardworking and in all their German thoroughness brew excellent beer.
And even if their reputation says otherwise, the Germans invented romance. In the 18th and 19th centuries many great ideologies began here, but also the horrors of the Second World War. Light and darkness lie close together in German history. Many technical achievements can be traced back to German scientists. On the other hand, lots of things which appear to be typically German come from somewhere else entirely. Football, for example, comes originally from England, beer was invented by the Sumerians and it is impossible to imagine German everyday life without doner kebabs, falafel and co.
Germany is multifarious; everyone has their own personal experience with "the Germans" and what is "German". Come as unbiased as possible, be relaxed, bring with you humour, curiosity and patience. With time you are sure to settle down and feel at home in Germany.
What you are certain to notice is Germany's federal, decentralised structure. University politics is largely the business of the 16 federal states. What is true in one state might be quite different in another! For example, tuition fees: some states have introduced a general tuition fee of 500 Euro per term. Others rejected this.
On the internet there is a wealth of information about Germany. There you are sure to find out things worth knowing, news and amusing stories about your future study home.