Start by clicking the "Add to Site" button and copying the WordPress shortcode of the item you created.
Add the item to a post/page using the Gutenberg editor
Add the Shortcode block to your post/page and paste the shortcode you previously copied into it
Add the item to a post/page using the Classic editor
Just paste the shortcode in the editor, in the location you would like it to be displayed
Add the item to a post/page using the Elementor editor
Add the Elementor shortcode widget and paste the shortcode into it