Your home university will nominate you until 15th of May. As soon as we received your nomination, we will check it and send a welcome-e-mail to you if your nomination was accepted. The e-mail will include information about how to apply, find a room and the like.
To study Psychology at Universität Hamburg your German knowledge has to be on minimum B1-Level of the Common European Framework of Reference for Languages.
Further information around application, admission, required documents, the online Portal and so on you will find under: https://www.uni-hamburg.de/en/campuscenter/bewerbung/international.html