Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
I just dumped all my Microsoft apps and cancelled my subscription. I'm using an office suite called SoftMaker NX ($25 a year for a subscription). It's a German company and it works much like MS Office. I had to choose a different cloud service to move my documents from OneDrive, but I honestly prefer it over OneDrive at this point.
Like anything that involves change, there are some learning curves to SoftMaker, but they're not many as much of the functionality is quite similar to Word.
As a professional writer myself, I very much enjoy SoftMaker and highly recommend it. They also offer the ability to buy their software outright if you don't want to subscribe.
As for cloud services, there are multiple secure services that don't use any kind of AI to scan your contents to make "suggestions" - they may have a heavy upfront cost, but they're totally worth it.