Now this is where you will need help. There are a few Ecommerce Platforms out there from BigCommerce, SquareSpace, Wix to Woocommerce and Shopify. A web designer (like Jascom Ltd) can advise you which platform is suitable for you. Some platforms like Woocommerce (most popular) are a complete online shop which is installed into a new or existing website. While Shopify is an online shop in itself and while its very good at selling its not so useful if you want to do other things with your website like Blogs or Virtual Tours. All of these platforms have templates which defined the way the shop experience looks and feels for the customer. Your web designer can help configure all of this for you but if you are starting out you will need help from a techie.