Besides a good knowledge of German in order to study in Germany you will need a qualification for university entrance, that is, a certificate which would permit you to study in your own country.
However, universities in Germany may also have other requirements. For example, for certain courses or at several universities there are additional requirements regarding grade point averages or language ability.
Please also take note that closing dates for applications differ. You should, therefore, get as much detailed information as possible on the admission requirements for the course of studies you have chosen. You will avoid disappointment later on!
Points of contact on such questions are mainly the academic international offices and the students' offices at the universities.