Use your Microsoft account through microsoft365.com/setup for everything you want to with Microsoft 365. Create an account or use the account of services such as OneDrive, Skype, Outlook, or Xbox Live. Use the site microsoft365.com/setup to download and install Microsoft 365 setup that will allow you to use multiple apps like Word, Excel, OneNote, PowerPoint, or more.
To see this working, head to your live site.