I have a couple of small questions…
How do I get the categories from displaying above the hero slider on the home page?
How do I create a custom message like what was shown on the theme demo?
Your theme is a premium theme and we Volunteers answering questions on this forum have no knowledge of how they are designed to operate. When you purchased your premium theme what came with that purchase was support directly from the theme designer in the Premium Theme Support Forum. There is a link for the specific Premium Theme support forum under Appearance -> Themes in your blog’s Dashboard, but do note that the premium theme must be active and you must be signed in as the user who purchased it in order to see it. Also note this is a weekend and you may not be able to get support until Monday.