Congratulations - altho' you may learn you have created a monster
. If she continues to have problems setting off, you might want to see if you can fit a rear cog with more teeth. We teach them starting with the usual "pedal up" and "big push commands with the emphasis on "push"
Altho' we usually find that they get hold of starting pretty quickly. On the other hand, the youngest ones we've taught have been 3 and up.
Good luck