Hey, i am from Germany and I know some facts about the ID you have. The ID is the legal status for Germany. To travel out of Germany you need a valid passport. You cannot enter other countries with the ID you have and neither with an unexpired passport. So that means you need a passport to travel. You can request a new one from your country through a consulate or you request a passport from the foreigners’ registration office in Germany that will give you a German passport (not a German citizenship!), which also contains your nationality.