Start / Login page

I need your advice how to setup my startpage with ES. I would like to have only the ES login module and a Joomla Article visible for public views. After login my users should be directed to the ES community dashboard. This is not to difficult to built up, but I then still have the public homepage as the start page in my menu......logged in users shouldn't see this startpage. Please give me a hint how to do this. The dashboard should be the startpage for registered users, public ones should only be allowed to see a site description and the ES login module....

Thanks for your support!