Is it ideal, not really, but she's going to be on her ass all day, regardless of what board she takes out so it doesn't make a difference.
Just put her on it and see how she likes it, if she starts to show an interest, pick up a more user-friendly setup on Craigslist or something.
The question is whether a rental womens non-magnetraction most-likely-cambered board
is a better choice as opposed to a slightly oversized forgiving rocker with magnetraction
for a first day of learning.