If you don’t have a demo account in O365, start here. The description is for Dyamics 365, but you end up with a Office 365 and Dynamics 365 demo data.
Navigate to Office.com and open the admin center.
Find the Power BI PRO and start a trial
Remember to add the license to the user before you continue.
Continue Reading Thomas Sandsør’s Article on their blog
Power BI starting a trial
Blog Syndicated with Thomas Sandsør’s Permission