I approach people, I socialize with them, I ask them questions, I am open to discussions and they still notice I'm shy? How do I hide it better?

I'm not shy, but I would rather say I'm socially anxious because I'm not satisfied with my social status (not enough money, barely started my first job, I'm the youngest in my office). I know I'm at the bottom of social hierarchy because that's objectively the truth. Also, many people don't think intrinsic value is a thing. Someone at work said that I was shy. I admitted it and some other people were very surprised to hear that. I don't mind being shy, but how else do I advance in my career if I don't convey a more dominant and secure attitude?

I approach people, I socialize with them, I ask them questions, I am open to discussions and they still notice I'm shy? How do I hide it better?
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