Build an Online Store

I am currently building an online subscription service. The website is being built through www.websitebuilder.com. I now need to build the the online subscription form functionality, as well as include payments/subscription functionality. I know the design I want for the online form that will lead to the payment page, so I can deliver an wire frame of that to you. I suspect that using Stripe Payments is going to be the best option for the website to collect subscriptions, so I would also need that integrated in to my site. I subscription form will need to be able to export the form data to my email or CSV. So the job is to build the subscription form that the customer will fill out, and attach it to a payment system that will then collect the customers initial payment and ongoing subscription. The subscription form needs to capture details such as: What colours, what style (through images), what size they are etc. It needs to be interactive so they are only asked one question per page. Once they have chosen (via the form), what subscription package they would like, and what their preferences are, they should be delivered to the correct payment screen. This all needs to integrate into my website builder site, so that the customer is not transferred to different sites throughout the sign up process. I am available if you have any questions. Thanks, Holly