E-Commerce Site from Sound App Design

I have a complete visual reference for the project here: https://www.behance.net/gallery/253401185/Sound-App.
I want an e-commerce website that mirrors this exact look and feel, but the store will sell only digital products—no physical fulfilment, so the checkout flow must deliver instant downloads / licence keys once payment is confirmed. Credit and debit cards as well as PayPal are the two payment options I need built in; customers should be able to switch between them seamlessly at checkout.

The primary focus is translating every screen, animation, and interaction shown in the Behance file into a responsive web experience. Typography, colours, micro-interactions and the audio-inspired motion effects are non-negotiable; please keep breakpoints and accessibility in mind so the site performs just as well on mobile and desktop.

I’m flexible on the underlying stack—custom development, Shopify, WooCommerce, or a modern headless setup are all possibilities—so long as the final result loads quickly, is easy for me to update new digital products, and meets PCI-DSS best practices for card payments. If you have a preferred framework or library that will get us to pixel-perfect parity faster, let me know.

Deliverables
• Fully responsive website replicating the Sound App design
• Product upload system for digital files with automated delivery after purchase
• Integrated Credit/Debit Card & PayPal checkout flows, tested end-to-end
• Administrator guide or short video so I can add products and track sales on my own

Send a brief outline of how you plan to approach the build, including any third-party services or plugins you recommend, and an estimated timeline for each milestone. I’m ready to get started as soon as we agree on the approach.