My brother is blind. He has been using JAWS for over a decade.
I love OSS, and I know many distros have screen readers.
Yet JAWS is just out there ahead.
If she finds it too complicated: try and simplify things. Remove unneeded icons and menus. Customize her shortcuts. Install TeamViewer (if she is remote).
Keep helping her man. The internet, for my brother, is a place where his limitations are minimized.
Yet to have the world open up in front of you, is all worth it. My brother (just as me), speak spanish. He uses JAWS still the same, although the bulk is in english.
Let me know if I can help you in any way.
PS: If anybody can point me in a direction to help OSS screen reader software, please do let me know. Would love to contribute back.