I just posted about this...but YouTube is her friend. Particularly the work of the Ukulele Teacher. She will be able to play songs that she wants to learn, which will be crucial.
If a student is motivated to learn, they will spend HOURS with their ukulele and YouTube. One of my great joys after introducing many students to the ukulele is having 10-12 students who go home and play their ukulele until their parents ask them to stop. That seems like a bad ratio (12 out of 400) but I know of very few music students (taught in a "traditional" music class) who do the same on any other instrument. I'm a music teacher and I only practiced as much as I had to. Today it isn't uncommon for me to play hours at night, even playing all day long with my choirs.