I installed the theme 1stclass via Quickstart with the example data.
I made the theme default.
I can see all the files in the backend (content...)
But the homepage is empty, just blank.
What did I miss?
Is there a documentation for beginners?
Thanks
Susi

Hi Susi,
I think its a script or php error.
Please check if your Joomla is working with another template set as default.

Blank Page Error
This is most likely due to a php error being thrown. Please enable the display_errors parameter in your php.ini. Only with an error message the problem can be found.

Another way to check for PHP errors is to have a look at your PHP error log. The PHP log shows information on errors and warnings thrown by PHP. Your host should have configured PHP to write that information to a log rather than output them on screen.

Please check this guide to PHP error messages for webdesigners for a more thorough view on the subject.