"But I'm not a professional," many people say to me when I discuss their careers.
I hear this a lot. Aspiring artists, writers, publishers, coders, etc. They all figure they're not professional now, but at some point in the future they'll be pros. Until that point they're not professionals – and thus they figure no one will talk to them, they can't join professional groups, etc. Professional comes with some special future achievement like the right job or the right degree.
I think that's B.S. Professional is an attitude.