Shopify E-commerce Site Build

I need an initial concept Shopify store that can scale.
My core goal is to sell products online while keeping stock levels, images, and basic item data in sync with a few other sites I’ll be rolling out. To get started, I want a clean, conversion-focused theme, product pages ready for launch, and the technical groundwork that lets my future sites pull from—or push to—the same inventory pool.

Key pieces I expect delivered:
• A basic Shopify storefront configured with up to ten sample products so I can see the flow.
• Inventory management set up and demonstrated (native Shopify stock tracking is fine at this stage).
• Payment gateway integration using Shopify Payments or PayPal, whichever is quickest to enable.
• A customer-review section on product pages so buyers can leave feedback.
• A lightweight method (for example, a shared CSV, a simple app, or an API hook) that lets the next site reference the same product data and images without re-uploading.

Keep the build lightweight and well-commented so I can expand it later—no custom app development needed yet, just clear pointers on where to plug new sites in.

If you’re comfortable setting up this starter framework and can hand it over ready for me to test, let’s talk timelines and a quick walkthrough video or doc for hand-off.