This will give you a quick guide on settings up the theme as per demo site. Note that WordPress and Elementor page builder knowledge is required.
Install and activate theme
Install, activate and setup Elementor Page builder plugin
All these plugins are within your downloaded folder.
Optional: Setup WooCommerce settings
Optional: Setup Instagram Feed at footer
Edit other pages to meet your preferences
Content Width : 780px
Sidebar Width : 300px
Full Width : 1140px