Customization
Most WordPress themes allow for some customization one way or another. It varies. This theme is fairly simple and display tiles of the latest blog posts. You are able to customize the title, header, background, one colour, menus and widgets. You can customize by going to your site’s Dashboard > Appearance > Customize.
If this theme is not meeting your needs, consider using another theme by going to your site’s Dashboard > Appearance > Themes.
Another customization is with widgets. For this theme, widgets are on the bottom of this page and can be customized by going to your site’s Dashboard > Appearance > Customize > Widgets.
You should go to your dashboard to delete this page and create new pages for your content. Have fun!