[TYPO3-english] Can not get frond end up in new install

[eman white]

Hi, I successfully installed typo3 and can access the backend. 

There is an error showing on the front end.  I assume because there is no template selected.  I would like to install the basic bootstrap template. 

I went to > Extension Manager then in the top left went to the drop down and selected "Get Pre-configured Distribution".  
I see "The Official Introduction Package" and click INSTALL.  I receive the following error:


Service Unavailable (503)

No pages are found on the rootlevel!



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Anyone have any insight as to how and get the front end up?

Would appreciate any assistance.