I'll come out of lurker status to suggest your sister obtain some training which focuses on the very moral, ethical and legal issues which concern her.

My experiences were through FrontSight though I'm sure there are others cheaper, closer, etc. Training there emphasizes that you are the actual weapon and, as such, it is your mind which needs trained and honed.

I will confess that I entered training somewhat plagued with testosterone poisoning. I've left what I've had thus far realizing how far I've yet to go before I feel comfortable with a defensive firearm.

Latvija