WordPress Digital Store Redesign

I have an existing WordPress site that needs a thoughtful rebuild. The first goal is to reorganise the navigation by introducing several new parent pages so visitors can reach key sections in one-click rather than hunting through deep menus. The second—and larger—goal is to transform the site into a fully–functioning online store for digital products. I want customers to arrive, browse, pay and instantly receive their downloads without manual intervention. Key elements to be delivered: • Payment gateway integration (PayPal/GPay/ SamsungPay/UPI/Credit Cards are all fine; I’m open to suggestions) • Automated delivery of downloadable files immediately after purchase • Customer account management so buyers can log in, view order history and re-download (2 times only) their files Please build on WordPress using a well-supported e-commerce plugin such as WooCommerce, Easy Digital Downloads or another comparable solution you recommend. The finished theme must be mobile-responsive, fast-loading and easy for me to update later. At the end I’ll need clear hand-over notes covering: how to add new parent pages, upload additional digital products, issue refunds, and update payment settings.