Can we create a link for "Complete your Profile", so we could put this link on the community Overview page.
There is not a good way to have a universal link to the edit profile page. What I normally do is give instructions on how to get to their profile and edit it. That way they know how to do it going forward.
There are good instructions here:
Jive 6.0 Community User Documentation
Jive 7.0 Community User Documentation
Retrieving data ...