I will say, the differences from Microsoft in LibreOffice are often not subtle; very simple documents will probably be fine, but you run into a lot of formatting issues on complex existing documents. Unless they already use LibreOffice or they don't have a lot of pre-existing complex-formatted documents, don't put them on LibreOffice.
Other than that, the use case should be mostly fine then. Just be careful; as I tend to run into myself, it seems it's been so long since you've run Windows that you're going to underestimate the learning curve.
I just realized a few things to check, though. I don't think CPU or GPU support on Debian should be an issue (and if it is, backports kernel and Mesa would solve it), but check Wi-Fi modem and camera support before you install.



