Looking for work in Bremen or Hamburg or surrounding areas

You should try with Flyline in Bremen. This british company recruits a lot of english speaking people to sell plane ticket by phone. You can try to google " Flyline Bremen jobs".

In Hamburg, there must be many call center which may need english speaking agent as well.

If you are really open to everything, you can find physical work in any restaurant or fast food restaurant. This will be hard, but very good to learn the basics of a language. But do you speak German ? Fluent ? Or just a bit ?
If German is a pain for you, you should try with youth hostel or Irish pub. Many australians or americans work as bartender in youth hostel or irish pub. American franchise like Hard rock café or Mac Donald hire a lot of expat and immigrant.