The section you will start in, is the Form Placement Tab, this is the first screen you will see after succesfully signing up.
The WooCommerce Pages sub tab
You can enable the other pages, by clicking on the Enabled tab to activate *Green or deactivate *Gray.
The Product Subcategory Tab
You can go to the Product Subcategory tab, and choose the categories, subcategories and also enable the form on all the Category products that will display sing-up tab.
You can also place a form straight into a specific product page. After you install the plugin, you will find extra options beneath the new product or edit product page.