Hi @AntiAnton
As I understand it, you are a Ukrainian citizen who received a second citizenship. As long as you still have Ukrainian citizenship, you are entitled to temporary protection under paragraph 24 in Germany. The main conditions to receive this are that a person is a Ukrainian citizen and that they were living in Ukraine when the war began. It is also possible to have left the Ukraine up to 90 days before the beginning of the war of February 24th 2022.
As you do not require a visa to come to Germany, you can travel here and apply for a residence permit in Germany. There are two options in this regard.
1: If you have someone you know who can offer you temporary accommodation, you can register at their apartment and apply for your residence permit at their local immigration office (in German ‘Ausländerbehörde’).
2: If not, you have to go to the central reception centre in whatever German state you are in. Germany is a federal country and so each state has its own registration procedure. This central reception centre is called ‘Erstaufnahmeeinrichtung’. You will then be assigned to go and stay in a particular part of that state or possibly another state. This depends on the capacity of that state and how many people from Ukraine they currently have to process.
Here the procedure in Berlin is explained (the page is also available in Ukrainian and Russian):
https://***.berlin.de/ukraine/en/arrive/
This is also a general useful resource in various languages:
https://***.germany4ukraine.de/hilfeportal-en
Best,
Éanna