Mac for authors

I bought a Mac several months ago (still transitioning from PC, so using both). I am having a steep learning curve, not so much with the Mac, but with using Microsoft Office for Mac. I find that One Drive backs up my PC hard drive, but will not back up the hard drive on my Mac. I wonder if anyone else uses Office for Mac and if you have any suggestions for the use of One Drive. I’d greatly appreciate any wisdom from those who have made this transition before. I may have to get icloud and disable OneDrive. Thanks for any insights or helpful resources!