Hi Michael,
I think you should first login to https://www.office.com/
You will find an icon "install and more" on the top right side of the page.
Klick it. it will open a menue. Klick "install Microsoft 365 Apps". You will be forwardet to a page where you can download an executable ("OfficeSetup.exe").
Execute that file to install the Office 365 Apps on your local Client.
Hope that helps.
Best regards,
Jonas