I created an online store in a few days. I used Shopify website builder for this, there are many ready-made themes and templates that will help you create a site quickly and without problems. In order to manage the online store doesn't take much time, I usually use software such as https://apps.shopify.com/advanced-product-options . This helps to add new products to my website faster, I can use different labels and settings to sell my goods to different categories of customers and at different prices, I can now include delivery in the price of the goods without any effort and without wasting time. It really helps to save a lot of time, so I advise you to look for additional software for your online store as soon as you start your business.