Hi,

If you want to use Shop for another demo, you need to install plugin Woocommerce to create your shop page - you can install this plugin by search for this plugin from Plugins > Add New > fill the plugin name on the search box on the right side.

And you can check documentation for how to config woocommerce here

For more options for shop, you can check it via Customize > Woocommerce.

For control sidebars for Woocommerce, please go to Appearance > Widgets > add more widgets to sidebars here: http://prntscr.com/rae3uq

Best Regards,

PenciDesign