There are many platforms that support eCommerce today such as Shopify. Dropshipping on Shopify can be seen as a good choice for you when starting eCommerce. Besides, you should seek apps on Shopify to support customizing stores. They would be a great help for your start. A great suggestion for you would be Gempage, a complete storefront customization tool with powerful AI-powered features and a Visual Editor. This app allows you to quickly create any kind of high-converting landing page using available templates, or generate layouts from images/URLs with AI with no coding required.