Beginner friendly: Moderate

Starting a side hustle as a book author can be challenging for beginners due to the competitive nature of the industry and the need for writing skills. While it's possible to self-publish online with platforms like Amazon Kindle Direct Publishing, success often requires marketing efforts to reach a wider audience. Many online resources offer tips and guides on self-publishing, but standing out among the vast number of books available can be difficult. Costs range from $0 to $100 for basic tools and software. It may take several months to years to see a profit, depending on the book's success. I'd rate it a 2 because while it's feasible for beginners to start, achieving profitability requires dedication, marketing skills, and writing talent.