There are many great online courses available to learn AI. Here are a few of the best:

• AI for Everyone by Andrew Ng (Coursera): This course is a great introduction to AI for beginners. It covers the basics of AI, such as machine learning, deep learning, and natural language processing.
• Artificial Intelligence Nanodegree by Udacity: This nanodegree is a more in-depth course that covers a wider range of topics in AI. It includes hands-on projects and assessments to help you build your skills.
• Deep Learning Specialization by Andrew Ng (Coursera): This specialization is a great way to learn deep learning, which is a type of machine learning that uses artificial neural networks. It covers the basics of deep learning, as well as more advanced topics such as convolutional neural networks and recurrent neural networks.
• Introduction to Artificial Intelligence by Stanford University (edX): This course is a great introduction to AI from one of the top universities in the world. It covers the basics of AI, as well as some more advanced topics such as search and game theory.

When choosing an online course to learn AI, it is important to consider your level of experience and your goals. If you are a beginner, you may want to start with a course that is specifically designed for beginners. If you have some experience with AI, you may want to choose a course that covers more advanced topics. And if you are looking to get certified in AI, you may want to choose a course that offers a certification.

No matter which course you choose, make sure to practice what you learn. The best way to learn AI is by doing. So, find some projects to work on or join a community of AI learners. With hard work and dedication, you will be well on your way to becoming an AI expert.