Your theme comes with two widgetized areas, the blog sidebar (shown to the side of the main post content within single posts) and the footer, which allows a number of columns of custom widget content for whatever you wish.
There are a couple of ways you can get started with widgets within WP, we recommomend the dedicated admin page found under Appearance > Widgets in your WP dashboard however you can also add/edit widgets to the available widgetized areas via Appearance > Customize however this can be a little cramped with your working with many widgets at once.
Adding Widgets
When you arrive at the Widget admin page, you will be presented with an array of widgets on the left and the widgetized areas on the right, to add a widget to one of the sidebars, simply drag your desired widget over to the sidebar of your choice on the right and your all set. From there simply edit the widget as you wish (depending on the widget your using of course) and your done.
