If you have successfully uploaded the dummy content you must have data in the Posts, Pages, Speakers, Sessions, etc.
You can check this by clicking in these sections of your Dashboard.
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 in this section of our Tyler Guide https://www.showthemes.com/docs/tyler/documentation-and-theme-guide/#6.