Information about unemployment in Germany

Dear colleagues and Alumni, I am an italian Phd fellow of an ITN network based in Frankfurt am Main. In September 2019 my PhD is going to be over and the employment contract with the Goethe University too. I am considering either to ask for funds at several Fundations or Associations or to use the unemployment period. How the unemployment procedure is working in Germany? How an eventual scholarship (i.e. no employment contract anymore) would affect the procedure? Bests regards, Giammarco Nalin