Minimalist E-Commerce Website for 8 Battery Items

I need a clean, modern online store dedicated to eight battery products. The look should stay minimalistic with generous whitespace so each item’s photos, specs, and benefits stand out clearly on every screen size.

Core build requirements
• Product catalogue and individual detail pages for all 8 batteries
• Shopping cart with quantity updates and real-time totals
• Account creation and login so returning customers can track orders
• Credit/Debit card payment gateway (no PayPal or bank transfer for now)
• Smooth multi-step checkout that confirms orders instantly
• Lightweight admin panel where I can add or edit products, change prices, and review incoming orders
• Fully responsive layout that feels fast and intuitive on phones, tablets, and desktops

Please show previous e-commerce work that reflects similar simplicity and let me know the timeline you would need from kickoff to launch. I am happy to answer any technical questions that help you scope the project accurately.