Is it really about who you know to get a job?

Many of you know I’ve been having a hard time getting a job let alone just an interview. My oldest sister said it’s all about who you know and to go to networking events. I feel odd just showing up not knowing anyone and not having anything to offer about me because I have no experience.

Anyways, there’s this position that I want that my bf’s sister told me about. She told her manager about me and is handing her my resume. I’ve applied trying to reach hiring managers there before but never get a call back or answer. Limited Brands is really hard to get an interview with.
Heck, my friend had no HR experience and got through interviews because of her friend’s mom that worked there. She didn’t get the job though but she was ALMOST there.
Other than that, what else can I do to make myself stand out to get an interview or get hired? My bf’s sister said she would do practice interviews with me since she knows what the company looks for. I’m going up against other in-company candidates =\