Why do I see the Member list instead of my front page

probably your index_html is missing. the frontpage has to be named index_html and of type Document.

Why do I see garbage only on my front page

Did you upload a picture? Make sure you create a new Image (UploadPicture) to upload a picture.

Which Document type to use

use structured-text for easy formatting

plain-text is boring, use html only if you want to use your own formatting.

html does not support Javascript and EMBED tags