Or, ask her to read this:
7 Ways to Overcome Your Fear of the Unknown And Get More Out of Life
The Bottom Line
To live your dreams and embrace life, you have to be fearless and willing to step into the unknown. There is no other way to live your life to its fullest potential. Listening to your fear of the unknown will only result in a life where you live in discomfort and dissatisfaction with life.
The 7 strategies are tools that you can use to help you overcome your fear of the unknown and become the courageous person you were born to be. Go live your life to the fullest. Embrace change, ride the wave of fear and experience life to the fullest. You will not regret it – that is a promise!
https://www.lifehack.org/347868/why-fear-the-unknown
Also, remind her that you won't be being shot at on a REGULAR basis at your new job! ;)