Magento ecommerce

I need to create a website from scratch using Magento. We currently have a website on PrestaShop and require an upgrade to Magento for better performance. This new website should include a custom module designed to fetch and update products from an SQL Server database. Additionally, it's necessary to develop a connection with a payment gateway through an API. The website must also be integrated with Google Merchant Center for advertising management and to export product feeds to Facebook.