Creating a staging area for WordPress.com site

If your friend has a wordpess.com business account which im guessing she has if she is using woocommerce you can always go down the plugin route.

if you want to move to a stage variant you could possibly use WP Staging plugin which will give you a copy of the site to play with

if you want to go down the local route or move to a cheap staging host which you could pick up really cheap you could use duplicator, both of these plugins are available on wordpress.com