Why is work not providing a laptop to you? Making/allowing you do work on a BYOD is insanity from a security perspective. I hope your company doesn’t have to go through PCI compliance audits or do any kind of transactions with the general public’s credit cards…
To be clear: what I wrote here is not a linux user’s opinion, but rather someone who works infosec for a Windows-based organization.
With that being said, you can use O365 apps through the browser just fine as long as you work out of your OneDrive or your team’s SharePoint storage exclusively. You can even use Outlook/Exchange through O365.
But if you can, I’d push for a company laptop even if you stick with your Macs. Mixing personal devices with work is a baaaaad idea for both parties.