Before you start you will need to have a product to market so how do you go about this task.
Government grants are made in order to persuade or assist enterprises to pursue courses of action that are deemed to be socially or economically desirable. https://medium.com/@denopergae/koszty-%C5%BCycia-w-niemczech-ile-trzeba-wyda%C4%87-na-utrzymanie-154ee290b4ef