how do i create a group?
 

i can see the already created groups but how can i create one?

on your profil click on your groups, then create a group.

i still dont see a "create a group" button. what am i missing here

Go to the menu at the top of the page and click on "Community." This will take you to the front page of the community. Now you will see a set of menus directly above the community information with a My Stuff option. Click that drop down and choose Groups. On the left you'll see a link that says "Create Group."

got it now, thanks dave.