Mobile-Friendly Shopify Store Build

I’m launching a line of physical products and need the entire storefront built on Shopify. The design has to feel clean and professional, load quickly, and guide shoppers from discovery to checkout just as smoothly on a phone as on a laptop... (Budget: $30 - $250 USD, Jobs: Google Analytics, HTML, Shopify, Shopify Development, Shopify Templates, Web Development, Website Design)