As I am now in a leading position in the middle of a agile transition:

has anyone got a source for a project done completely with user stories?

I am searching a real life example with already finished stories an active backlog and a documentation.

I just can't wrap my head around it. When and what do you document? In which Form do you document? How are you writing user stories with more content like diagrams and such?

(we use jira and confluence but just started with stories)

I read some articles on the topic and watched some talks but sill don't get the picture.