E-Commerce Clothing Store Website Design

I’m launching an online store that will sell physical Clothing and Accessories, and I need a full e-commerce website created from the ground up. The finished site should:

• Present a modern, fashion-focused look that reflects a retail clothing brand.
• Include all standard e-commerce pages (home, catalog with filter/sort, product detail pages, cart, secure checkout, account area, order-tracking).
• Support inventory management for multiple SKUs, size and color variations, promo codes, and an easy-to-update product catalog.
• Integrate popular payment gateways and real-time shipping/tax calculators.
• Be fully responsive and fast-loading on mobile, tablet, and desktop.
• Come with basic SEO setup (clean URLs, meta tags, image alt text) and Google Analytics connection so I can track sales and traffic.
• Be delivered on a mainstream platform such as Shopify, WooCommerce, or another solution you recommend, with clear instructions so I can add future products myself.

Please outline your proposed platform choice, a brief timeline, and any similar fashion or retail sites you’ve designed. I’m ready to move quickly once I’ve reviewed portfolios that fit this style.