Greetings!
This is Tin, I understand that you would like to install MS Office 365 Family on your new PC.
To do that, please go to https://m365.cloud.microsoft/apps
Please sign in the account with your subscription.
From the MS 365 Apps page, please select Install apps. Then Select install.
Once the download is done, please run it to install MS Office apps.
For your reference, please check and follow the steps below:
Thank you,
Tin