Hallo!
creating a "verein" is quite simple in german. you need 7 people, have a meeting with all of them to start the foundation of a "verein". after that you write a "satzung" (the articles of the association), and decide who of the 7 do what. (board of directors, finance, ....).
we just founded a pd~graz Verein here in Graz ...
LG Georg