Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
I don't know if you've had a good answer yet...but the way I'm handling this is to use Pages from Apple. It's free and seems to be just as good. I use Word 2011 about 3 times a year for an Association I chair...I'm NOT going to pay to "upgrade" to something I rarely use.
I suggest that you evaluate the free version of Microsoft Office on-line applications at OneDrive.com. They may be sufficient for your needs. There is free email at Outlook.com.
Other free options include Google docs and LibreOffice, as well as the apps Apple provides (Mail, Pages, Keynote and Numbers).