Once you have an Office 365 account, you will also need a Power BI trial license or Pro license. Your IT administrator or Office 365 administrator can assign you a Pro license for Power BI. Otherwise, follow these steps to register for a trial of Power BI:

1. In a web browser, enter https://powerbi.com into the browser bar and press the Enter key.
2. In the upper-right corner, click on Sign up free.
3. Scroll down the page until you see Cloud collaboration and sharing on the left-hand side of the page. Click TRY FREE.
4. Enter your Office 365 email address and follow the prompts from there.