Shopify Digital Products Store Build

I need a complete Shopify-based store that sells downloadable digital products only—no physical inventory will ever be shipped. The project covers everything from setting up the theme and navigation to configuring secure payment processing and automatic file delivery after purchase. I will provide the product files, copy, and basic branding assets; you handle the technical build, light design tweaks, and any app integrations required to make the customer journey seamless.

Key deliverables:
• Shopify theme installation and minor customization to match my brand palette
• Product catalogue creation with instant-download functionality
• Payment gateway configuration (PayPal and credit card at minimum)
• Tax/VAT, digital goods compliance, and email receipt setup
• Basic on-page SEO, speed optimisation, and a brief hand-off guide so I can manage the store myself

I’m looking for a clean, responsive store that loads fast, works flawlessly on mobile, and makes the buying process frictionless for digital goods. Please outline your approach, relevant Shopify experience, and an estimated timeline in your proposal.