E-commerce Store With UPI Payments

I need a full-featured e-commerce website that lets customers move smoothly from browsing products to completing checkout through UPI. The store will be the core of my business, so everything—from product listing, search and filtering, cart, and order confirmation—must feel quick and reliable on both desktop and mobile.

Key expectations
• Unlimited product catalogue with categories, images, price variants and stock control
• Secure cart, coupon/discount handling and an intuitive checkout flow
• Native UPI payment gateway integration as the primary option
• Order management dashboard where I can track, fulfil and update statuses
• Responsive design, basic on-page SEO and fast load times

I’m open to your suggestion on the best platform (WooCommerce, Shopify, custom build or similar) as long as it meets the requirements above and lets me manage content easily without coding every time.

Deliver the complete site set-up, ready to accept real orders, along with a brief hand-off guide covering how I can add products, process UPI payments and export reports. Include your estimated timeline and any questions you need answered to start.