While I personally love LibreOffice, I get why your mom might not. It’s super easy:

1. Download and install Office
2. run irm https://massgrave.dev/get | iex in Powershell and follow the instructions
3. Profit!

What doesn’t she like about LibreOffice, out of curiosity? It’s easy to make the layout like Office (View > User Interface > Tabbed) if that’s her problem - I felt the exact same way, but the second I found out I could do that, I never went back.