Taking online courses on Coursera can give you the opportunity to learn about the languages that are used in creating serverless APIs, including Java, Node.js, and Python. You can also learn about specific serverless APIs like Amazon Lambda. With certain courses on Coursera, you can learn how to build a serverless API, such as a RESTful serverless API on AWS, which can give you experience using CloudFormation, Lambda, and API Gateway. You also have the option of learning more about cloud computing, machine learning, and Amazon Web Services, which can enhance your understanding of serverless APIs. This can include using real-world examples of a serverless website to build your knowledge and skillset.