I believe I am on the right track trying to use variants as "add-ons" to a service. But I think that the drop down menus are not fluid for the customer experience as the add-on could just be a quick clickable box. Is there anyway to achieve this in squarespace commerce? Below is an example of a website that functions the way I would like mine to function.
https://www.audioanimals.co.uk/shop/studio-services/mastering