Below some information that you might find useful and helpful:
Visas and residency
Check the entry requirements for Germany.
If you are planning to stay in Germany for more than 3 months, you must register at your local registration office within 14 days of arrival. The office is sometimes known as the Einwohnermeldeamt, Kreisverwaltungsreferat (KVR), Bürgerbüro or Bürgeramt.
Whenever you move home in Germany, you must register at your new address.
If you are resident in Germany before the transition period ends on 31 December 2020, you will be able to stay. To confirm your rights under the Withdrawal Agreement, you will need to obtain a new residence document.
The German authorities have not yet confirmed the process to obtain the residency document, but once it is announced you will have until at least 30 June 2021 to submit your request. You will need a valid passport when requesting a residence document.
For more information, read the German Federal Interior Ministry’s guidance and follow their recommended actions.
Passports and travel
The rules on travel will stay the same until the transition period ends on 31 December 2020. During this time, you can continue to travel to countries in the Schengen area or elsewhere in the EU with your UK passport.
Check your passport is valid for travel before you book your trip. Your passport should be valid for the proposed duration of your stay.
You’ll need to renew your passport before travelling if you do not have enough time left on your passport.
This information is provided as a guide only. Definitive information should be obtained from the German authorities.