You have an Office 365 based email address and you can access it on any web browser at www.office.com
However, it's very likely that you will want to be able to read your email on the go or from the Microsoft Outlook application on your computer.
Microsoft provides some excellent short video guides to help you get the best out of your investment.
Here’s the official video guide from Microsoft on adding accounts to Outlook on a Windows device (laptop):
If you are on a Mac device:
iPhone and other devices instructions can be found here: