Create Office 365 account

Access the Microsoft Office website.

At the top-middle of the screen, click Buy Office 365.

There are three options: Office 365 Home, Office 365 Personal, or Office Home and Student. ...

A sign in window appears. ...

Create an account by entering an e-mail address. ...

Enter a password.

Office 365 is a cloud-based, subscription model version of Microsoft’s popular productivity suite Microsoft Office. Office 365 contains the same core applications as traditional versions of Office, including Word, Excel, PowerPoint, Outlook, OneNote, and depending on the plan purchased, may also include other apps and services such as Publisher, Planner, OneDrive, Exchange, SharePoint, Access, Skype, Yammer, and Microsoft Teams.
There are a number of different packages available when licensing Office 365, including versions for personal use, multi-user households, students, businesses, nonprofits, and education institutions. That's why many users who are already using office are using Microsoft Office Migration service to move their businesses to cloud. 

There are also online- and mobile-only versions of Office, known as Office Online, through which users can get access to feature-limited versions of Office apps for free.

Steps to install Microsoft365:

Step 1 - Sign in to download Office

- Go to Official website and if you're not already signed in, select Sign in.

- Sign in with the account you associated with this version of Office.

- On the Office home page, select Install Office apps.

- This begins the download of Office. Follow the prompts on your screen to complete the install.

Step 2 - Install Office

- Depending on your browser, click Run (in Edge or Internet Explorer), Setup (in Chrome), or Save File (in Firefox).

- If you see the User Account Control prompt that says, Do you want to allow this app to make changes to your device? Click Yes.

- Your install is finished when you see the phrase, "You're all set! Office is installed now" and an animation plays to show you where to find Office applications on your computer.

- Follow the instructions in the window, for example Click Start > All Apps to see where your apps are, and select Close.

Step 3- Activate Office

- Start using an Office application right away by opening any app such as Word or Excel. Can't find Office after installing?

- In most cases, Office is activated once you start an application and after you click Accept to agree to the License terms.

- Office might activate automatically. However, depending on your product you might see the Microsoft Office Activation Wizard. If so, follow the prompts to activate Office.

To know more about Tenant to Tenant Migration Office 365 or Migrate SharePoint on Premise to Online  visit O365CloudExperts.

You need to sign up for Microsoft 365 and purchase any subscription plan. After that you need to add the domain and complete the setup. If you are looking to migrate from another Microsoft 365 Tenant, visit this article on Office 365 Tenant to Tenant Migration. 

More Resource:

Google Workspace to Office 365 Migration | Gmail to Office 365 Migration | IMAP to Office 365 Migration