When you go to Customize, there you will see various options available to customize your site. Just try those options one by one you will be able to understand how the theme works and can create any kind of site.
Some Available options in Customizer:
- Site Identity
- Colors
- Header Image
- Background Image
- Menus
- Widgets
- Homepage Settings
- Page-Template / Page Layout Options
- WooCommerce
- Theme Options
- Additional CSS
