Are there any certificate programs nearby in data viz? A quick search turned up this: Data Analytics Certificate Curriculum | University of Cincinnati
Certificate programs are usually in the evening and/or online (University of Washington Continuing Education often offers both versions for a program) and are targeted at career changers.
I'm sure it's not easy with 2 young kids, but if she could get someone to watch them, taking in-person courses are a great way to network (the best way to get that first position in a new career) and put your head into the field. Doing it at home on your own is possible, but with young kids it's hard to find dedicated time.
Best of luck to her! I made the shift when our son was young, but I was probably helped by having a tech background already. The more she can spend face-to-face time with others in the field (or moving into it), the better.
Suggest you reach out the Cincy Tableau Users Group - one of the leaders also teaches at UC and may know of specific programs in the area