Do you speak any German? this website allows you to search for midwives that are English-speaking and you can filter for what you need (care before birth, during birth...) I'd be happy to translate it for you if you're not fluent in German.
i was there for a midwifery class in november and it seems like the hamburg and surrounding area natural birth scene is VERY active. so finding a good match for you really shouldn't be too difficult. just make sure to set up your care early. the popular midwifes are often booked solid very quickly.
I just wanted to put in a tip for anyone else in HH looking for a midwife. Claudia Fuckner (or really anyone at the Praxisklinik Winterhude) is fantastic for German speakers. Loved having her as my midwife!