Questions about life in Germany!

Hello!

I am moving to Germany in October or November. I have the German Passport and I have family that lives in Wuppertal, but since Its a small town and I need a job, I am planning on moving to Frankfurt as I read it isn't so expansive to live there, compared to other big cities of Germany.

Since I'll be looking for a job, im considering some options and have some questions that I would apreciatte very much your feedback!

- For a young couple, that is planning on living at first really cheap, what would be the minimum cost of living for the couple? Is it possible to live with 1.000-1.500 euros?

- Is it worth living in a city nearby to save money?

- I have a graduation diplom in Business, but since I'm not fluent in German (speak only basic german) I think that initially I wont be able to find a job in an office (right?). How hard it is right now to find a minimum wage job? Will I be able to go to the ArbeitsAgentur to assist me?

Thank you very much :)