Physical Goods E-Commerce Site Build

My goal is to launch a full-featured e-commerce storefront dedicated to selling physical goods. The site needs a clean, conversion-focused design, secure payment processing, inventory tracking, customer account functionality, and seamless shipping-rate integration.

I have not locked in a platform yet, so I’m open to informed recommendations—Shopify, WooCommerce, Magento, or any other solution you feel best matches long-term growth and easy day-to-day management. Please highlight why your suggested stack fits those needs.

Key deliverables
• Responsive storefront with product catalogue, cart, checkout, and order-management dashboard
• Payment gateway setup (major credit cards, PayPal, plus any region-specific options you recommend)
• Tax and shipping calculators configured for my target markets
• Basic on-page SEO and speed optimisation
• Handover documentation so I can add new products and run promotions without developer intervention

Acceptance criteria
1. End-to-end purchase flow tested successfully on desktop and mobile
2. Page load time under three seconds on GTmetrix for the home page and a product page
3. Admin guide delivered in editable format covering product upload, coupon creation, and inventory updates

Share examples of similar physical-goods stores you have launched and outline your proposed timeline from kickoff to go-live.