If you have successfully uploaded the dummy content you must have data in the Posts, Pages, Speakers, Sessions, etc.
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You can check this by clicking in these sections of your Dashboard.
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But note this is not enough, you must add the corresponding widgets to see them in the homepage. To do this, go to Appearance->Widgets to configure the homepage sidebar.
You can see how to do this and all the widgets available on the āSetting up the Homepageā section of the Theme Guide.