Power BI is a very famous Business Intelligence and Data Visualization tool that is very popular. You can start learning Power BI from scratch by learning it from resources that are available for free, like tutorials, website articles, blogs, youtube videos, and other resources. Once you are confident about the fundamental concepts, you can learn by enrolling in paid training courses from learning partners. I recommend Intellipaat for learning Power BI by enrolling in the Power BI Course. You can also check out the following YouTube video that is customer feedback about this course.