To create a new page, go to WP Dashboard > Pages > Add New. Select a template for this page in the Page Attributes.
Give a Title for the page you are creating. Use an Excerpt field to create a subheader for the page. Upload an image to the Featured Image box if you want to show an image above/below the page title.
For those pages to which the default template is assigned, the option to hide the title is available.
If the Page Attributes is not shown, click on the Screen Options, see pic.
Resume page template
This theme includes a Resume page template. You can select this template when editing the page in the Page Attributes panel.
To create an outside sub-title, apply the H3 tag to it, look at the pic: