Hi Irfan,

Please follow below steps to use Office 365.

1. Sign up

1. To sign up for an Office 365 business plan, go to the Office Products site and choose Buy now.
2. Choose the plan you want to sign up for, such as Office 365 Business Premium.
3. Follow the steps to sign up for an Office 365 business plan and then add users and connect your domain.

2. Install Office

1. To install the Office apps, go to the Admin center.
2. To start the wizard, choose Go to setup.
3. Under Install your Office apps, choose Get started.
4. Under Microsoft Office Professional Plus, choose Install now.
5. Choose your language, and then Install.

3. Set up Outlook for email

1. On the Windows Start menu, search for Outlook, and select it.(If you're using a Mac, open Outlook from the toolbar or locate it using the Finder.)
   

   If you've just installed Outlook, on the Welcome page, choose Next.

2. Choose File > Info > Add Account.
3. Enter your Office 365 email address and choose Connect

4. Import email

If you were using Outlook with another email account, you can import your previous email, calendar, and contacts into your new Office 365 account.

1. Export your old email In Outlook, choose File > Open & Export > Import/Export.
   Choose Export to a File and then follow the steps to export your Outlook Data File (.pst) and any subfolders.
2. Import your old email
   In Outlook, choose File > Open & Export > Import/Export again.
   This time, select Import from another program or file and follow the steps to import the backup file you created when you exported your old email.

5. Use a public website

Office 365 doesn’t include a public website for your business. If you want to set one up, consider using a Microsoft partner, such as GoDaddy or WIX.

1. From the Admin center, go to Resources, and then choose Public website.
2. Choose Learn more under one of the options, and then sign up with a website partner and use their tools to set up and design your site.

I hope this helps.

Regards,
Lokesh