Self-taught bookkeepers use a variety of courses, seminars, books, and other online resources to learn about bookkeeping and accounting. You can also learn how to use accounting software, like QuickBooks, which can teach you about the basics of bookkeeping as well as the technology used by many businesses.

However, virtual bookkeeping services work remotely with their own equipment and cloud-based accounting software, and it removes all of the added costs of having a person in the office. In addition, businesses don't need to pay a full-time salary if that level of work isn't needed.

A bookkeeping side hustle offers incredible flexibility. It allows you to balance work with personal life. It also opens opportunities to work with a wide range of clients from different locations.