Beginner banjos come in right or left-handed models, so choose the one you are most comfortable with; there is no need to re-string a right-handed model to accommodate a lefty.
My daughter Sarah is a lefty, and she learned italic writing as a child and was very capable - as most lefties will be!
As a starter, the lefty is going to be dragging their hand over what they've written.
If she is a lefty, she might want to wear it on her right hand.
That's the way a left-handed person pours and Edith is the only lefty at Bird Song.