All persons, who wish to study at a high school, college or university, take a language course or do an internship in Germany, are required to obtain a national visa.
The necessary visa has to be issued prior to entering Germany.
The residence title cannot be issued while in Germany as a tourist. Applicants who have not yet been accepted at a certain university can apply for a study applicant’s visa.
Find more Information here:
Proof of financial Stability
Opening a limited-withdrawal Bank Account
Application Form National Visa