Student Talk / Requirements for Germany Scholarship [3]

Hi, I'm new to this platform.

I'm a 12th grade student and I'm apparently thinking to apply on some German Scholarships, but I don't know what kind of requirements and what kind of things to do first, since I want to enter into International Relations, will there be many opportunities for 12th grader? what is the percentage probability? I want to know what things I need to prepare before applying, and what kind of documents I need to submit, etc.
Any kinds of recommendations and critiques will be very helping and meaningful for me :))