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First if you dont already have Power BI you can download here → https://powerbi.microsoft.com/en-us/downloads/
Power BI Desktop is installed as an application, and runs on your desktop.
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The following screen shows the three view icons along the left of Power BI Desktop: Report, Data, and Relationships, from top to bottom. The currently displayed view is indicated by the yellow bar along the left. In this case, Report view is currently displayed. You can change views by selecting any of those three icons.
With Power BI Desktop installed you’re ready to connect to data, shape data, and build reports (usually in that order). In the next few sections, we take a tour through each in turn.