I can't find a single German university letting international?
Germans are sticklers for rules, but I would step back and recommend that you reconsider the option to study in Germany. Unless you are in a high demand field for which you can get a job after the degree, you will struggle to find a job that will allow you to stay. As a lecturer at a German university I d say that it's too late for you now. However, this gives you a full year to reconsider and if immigration is your aim then please go elsewhere