I Search an Developer to Make Some Enhancements into my Ecommerce

I own a digital product ecommerce. The site is ready already it already has a digital product ecommerce system, which would need to turn a workana service system, but not in network to several user at first only domestic moment. It already has ready cart system integrated with paypal in which when buying and paying the user low the file in question. What we need to do is try to describe in a buying process to facilitate The customer enters the site and will hire a logo for example. - He enters the site, poe the product in the cart and will make the payment - After the payment he would have access to a form (briefing) in which he has a series of questions to help how he wants the logo to be made, (I already have a diagram similar to attachment). - After the client's OK, the Briefing will be saved in the adm of the site and have another panel so that the client can see the briefing. And the historical paid product (already has in ecommerce would need to see if you can use) OPTIONAL: - We developed the logo and went online. The Customer may make observations that are saved or approve and consequently download the file and terminate the project. I want like Freelancer, [login to view URL] Workana or Wedologos but without community at the time, would be developed internally. Products and prices would already be pre-defined. Current site [login to view URL]