When I install a theme, as in full website template, it doesn't install, only the page with "hello world" comes up and the templates colours. It is just the standard blog page. How do you get the full site to show to edit?
The Hello World that you mentioned sounds like the default WordPress page. Generally when a theme is installed, it doesn't change the pages. You may want to see if the theme has a separate download or option for adding the pages. Otherwise, you might need to manually create the pages.