New school for my son grade 9

Hello everyone,

I am about to move to Hamburg in the coming months. My son will be attending grade 9 and I need to enroll him in a language school for at least one year. His studies are in English and he knows a little German, so I guess he won't be able to attend in a fully German school there.
Could you advice me where to look or whom to contact?
Of course afforadable fees are neccessary to be considered for my budget as well.

Waiting for your suggestions and thanks in advance.

By the way I am a former teacher too and I have a long path of teaching experience, almost for about 15 years till now.
I also ended my master studies in Germany in 'International education management' as well. I am ready to participate and work in any educational field as well.

Manar