>>6619196I've always loved this Frank Zappa quote:
“If you end up with a boring miserable life because you listened to your mom, your dad, your teacher, your priest, or some guy on television telling you how to do your shit, then you deserve it.”
Live your life exactly how you like and ignore your sister's bullshit. I'm the exact same way as you when it comes to taking risks and leaving my job/family etc. but I see that a lot of my friends and other people I grew up with are doing it and seem to be much better off.