You’re in for an uphill battle my friend. The biggest obstacle will be converting her word/excel workflows to a OpenOffice write/calc (or other open source alternative). Unless of course she is using the web version of M$ Office.

I have a work laptop, a personal project laptop (more work), and a gaming pc. I’ve intentionally resisted from installing any work/productivity/etc software on my gaming pc and found myself spending a couple hours navigating through OpenOffice Calc to perform a task that would have taken me 20 minutes in excel. It was possible, but without the familiar UI I was completely lost.

But.. If you can convert her to using web version of these tools, and find an intuitive enough desktop environment, you/she may have a better time with this transition.

Edit: On second thought, I would take a moment to consider what is causing you push her towards this transition. If learning how to operate in a completely different environment than what she is used to is not her fancy, neither of you are going to have a good time.

Either way, good luck.