A scholarship is not only for “Sebi” but also average students with average grades have chances to get a founding. Applying for a scholarship requires some effort, but it is worth trying. The worst thing that could happen is that your application is rejected.
There are several scholarships, every one with different requirements to you and different benefits. Finding the right scholarship can be sometimes difficult but fortunately there are very good resources for interested students.
Here is a summary of all scholarships: beginner, Deutschland and phd scholarships.
On Stipendium Plus there’s a good overview of all greater foundations with their requirements and benefits.
Mystipendium.de is one of the the biggest and most comprehensive search engine for scholarships. After you provide some personal data, the perfect scholarships are found for you. Only in German.