How can I feel content with my life?

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I am 24 and I don't feel any purpose in my life. I went to college and worked a crappy job while studying so I could pay for it. I never got to experience a lot of things that my peers have like travelling, partying, etc, because I was always working or studying.

I have a big family and I compare myself to my siblings a lot. They are all successful in their fields and it makes me feel more lost. I still live at home and I recently got a job in business. The job is good and steady, and a lot of people my age would be really happy to have it. It feels really empty to me though.

I need this job for money, but its not what I want out of life. I always thought that I'd be doing more with my life. I always thought I would be doing something creative or artistic, but my life just isn't going that way. I feel like I'm going down the same path that everyone else has; boring job - save money - buy house - the end.

How do I change my attitude? Better yet, how do I find purpose? I don't know what I like or love and it feels like my twenties are wasting away.

TL;DR my life feels empty. how do i appreciate what i have/find purpose in my life?