If you have experience as a personal assistant, secretary, admin assistant, or something in a similar field, then becoming an online PA may be a great role for you. Many professionals want someone to help organize their business and personal affairs. Jobs could include sending emails, managing financial affairs, booking flights and arranging day to day activities. If you are interested in this line of work there are many PA agencies that are crying out for reliable assistants.
You'll also need ecommerce software, fulfillment software, worry about warehousing, customer service, refunds and so on. But that's not all. You'll also need traffic. Think search engine optimization, Facebook ads, and other social media campaigns. Sound like a lot of work? Sure, it is. Especially if you do it all on your own. You could opt for Amazon's platform, which might be the easier route. But, then again, at the end of the day, this is a serious business, which could produce significant profits. So you're either all in or you're not.