What are my obligations if I want to work as a prostitute?

If you come from a non-EU country, you must check whether your residence status permits you to work in Germany. You can find more information here.

You need to get health counselling from a public authority and then apply for a registration certificate. You can find out exactly how to do this here. 

If you want to run a prostitution business, you need to apply for a permit. You can find out how to do that here.

You have to pay taxes. More details are available here.

You need to have health insurance. In some cases you may also need further insurances. You can find more information here.

In your work you must pay attention to hygiene and use condoms. Information on the transmission of diseases is available here.