How do you build a career

Hello everyone, I am currently a senior in college and majoring in sociology. I have applied to many jobs outside of retail and fast food but haven't had any luck. I want to start building my career and getting some experience. Sadly, most entry-level jobs require a few years of experience. Funny enough, I know some people who don't have any college education and have entry-level office jobs. How do I get started, where do I start? I dont have any friends, so cant really network. All I have is my college education and retail experience. How can I advance my career, and get out of retail? I'm starting to feel lost, career wise, and its making me feel as if school was a waste of time and effort. I really want to make things work, but as of right now its seeming kind of hopeless. Any advice would be much appreciated!