Frontpage does not show text nor image

Hello

I am trying to build a site and tried out a few themes and ran in a similar problem in all of them: I seem to be unable to display text, nor a header image. I included a background and header image and now it shows an image at the bottom, that is not even cropped right. Also: the text I wrote is not showing. Not sure what I am doing wrong. It seems to be a general problem as I had this issue with other themes as well.

The page I need help with: [log in to see the link]