There are bilingual facilities in Hamburg, both kindergartens and schools, where both the native language and German are taught.
A list of bilingual kindergartens and schools can be found at:
Kindergartens: http://www.kinderwelt-hamburg.de/Kitas.264.0.html
Bilingual day care centers and schools: https://mundoazul.de/collections/hamburg
International and Bilingual School and Kindergartens: http://bilingual-erziehen.de/zweisprachigkeit/sprachanreize/erziehungssystem/deutschland/hamburg/