[memyselfI]

I'd start teaching her the more standardized way which is right handed. As a lefty she should be able to pick up the switch back rather easily if she just can't figure it out right handed. As it is now you are dealing with a clean slate so go the more common less expensive route.

She could end up being a bit of both as my younger son is. He writes left handed, eats right handed, kicks right footed and plays drums, djembe, congas and bongos. My other son self taught bass, guitar, keyboards. Both of my sons got the musician bug and we love it. Except when they want to try to make that their life's work...Bubble busting is hard.

If she truly loves the instrument and/or has a gift for it then she'll pick it up rather easily. It's like magic to watch.