How to start the work with the plugin?
The plugin has a plenty of entities and options indeed. To have an easier start use the demo-data generation from the plugin settings’ page. That will create all ready to use calculators and products the same as for the plugin demo site. To see them in action, use their shortcodes on a page.
In case you have the WooCommerce plugin on your site, special demo-products with calculators will be generated also.