SharePoint 2010 (Stand alone) - Can't edit user profiles

I am unable to edit my user profile.   When I first click on Site Actions on the first page of SharePoint when it first loads up after install, I click on Site Permissions and I see the default groups it has created (Home Owners, members, viewers) and then I see my Administrator ID (Local Server account).

I click on the Administrator name (hyperlink) and it brings up a window form that has many fields for this profile...virtually all of them are blank.  When I click on 'Edit Item,' a window pops up and none of the fields appear....why and how do I edit those?  Why cannot edit the other fields?

This is my first attempt at installing SharePoint 2010...I am very new to this software.