During your first weeks in Germany you will have a lot to sort out. You must register your living address with the authorities and get your visa converted into a residence permit. You also have to take out health insurance and you cannot miss the deadline for enrolling at university!
Many Studierendenwerke offer help at the beginning of your stay in Germany:
At several universities the Studierendenwerke run a Newcomer-Service which makes finding your feet in Germany much easier. This service may include central contact points and information desks, special advice and support with administrative aspects. Similar help is sometimes offered by the international offices of the universities.
Many student accommodations offer tutors who are available to help international students. In addition, many Studierendenwerke offer a service package which mostly covers accommodation, health insurance and meals and often leisure activities and advice, too. This helps you get your studies off to a good start.