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.
Here are the steps you'll do when you run the setup wizard:
Add your domain, such as contoso.com.
Verify your domain.
Add your users.
Migrate email and contacts from another email service that uses IMAP (such as Gmail).
Setup online services, such as email and Skype for Business.
Change your nameservers.
Regards,
Willjoe