YITH Newsletter Popup gives you the ability to have a floating popup with a newsletter form in any theme. It also supports WooCommerce products.
Yes, you'll be able to do it using the option panel. You can also customize the style by adding your custom CSS in the specific option of the settings.
We tryied to create the easiest UI, so you'll just have to copy/paste the product ID into the form. If this info is not enough you can check our screenshots or watch the short video tutorial we recorded here