I need a straightforward online store for physical goods. The focus is on a clean, modern look that loads fast on mobile and desktop. Core requirements are: • Product catalog with variant and inventory support • Cart and checkout flow connected to Paytm as the sole payment gateway • Order confirmation emails and basic shipping calculation • Simple admin area where I can add, edit, or retire products myself • Responsive modern theme, lightly branded with my colors and logo (which I will supply) Keep the tech stack lean—WordPress + WooCommerce, Shopify, or a similarly popular platform is fine as long as Paytm integration is stable. I’m working with a modest budget, so please stick to essential features and use off-the-shelf plugins where possible instead of custom coding. Deliver the finished site on my hosting, walk me through the key settings, and provide a quick reference document so I can manage future updates on my own.