Not that this was one of your listed options, but have you considered setting up your own Plex/Jellyfin/Emby server along with the *arrs and adding her to that? You can’t get much more snappy and Netflix-like than that.
I can’t imagine this would offer a very pleasant viewing experience for a first timer when it relies on stuff like YTS, RARBG (they need to update their page apparently), KAT, EZTV, and TPB. I can see the potential for her to be bombarded with a bunch of fakes and low quality rips.