You have a couple of options for doing this sort of thing in an HTML widget or a Formatted Text widget, which are draggable/editable web components that you can drop onto your community home page.

Here's some helpful documentation on how to drag and drop widgets onto your site, and modify them to show things like links, images, etc:

http://www.jivesoftware.com/builds/docs/clearspace/latest/DesigningPagesWithWidgets.html