5 Topics to Learn First in Power BI PowerBI Course. Starting with Power BI can be exciting and a bit overwhelming given its robust features. To help you get started effectively, here are five fundamental topics you should learn first: 1. Understanding the Power BI Ecosystem Why It’s Important: Grasping the overall structure and components of Power BI is crucial as it helps you understand how different parts work together. Key Areas to Focus On: Power BI Desktop: The primary tool for creating reports and visualizations. Power BI Service: The online platform for sharing, collaborating, and distributing reports. Power BI Mobile: The app for viewing and interacting with reports on mobile devices. Power BI Gateway: The bridge for connecting on-premises data sources to Power BI. 2. Data Import and Transformation with Power Query Why It’s Important: Power Query allows you to connect to various data sources, clean, and transform data, which is the first step in any data analysis process....