You can download the Microsoft Power BI Desktop here. It is over 100MB, so it might take a few minutes to download.
You can download this software for free and install it on your laptop or computer.
There are three components to Power BI Desktop: the query editor, modelling and calculations side and thirdly the visualization side. If you an avid Microsoft Excel user of power pivot, power query and power view then Power BI will be fairly easy for you to learn. Essentially, Power BI is a combination of all three of these. You do not need to back and learn Excel’s power tools to be able to learn Power BI.