The professional has competence.
The amateur is developing competence.
The professional displays skills.
The amateur is working on their skills.
The professional demonstrates reliability.
The amateur is proving they are reliable.
The professional has earned respect.
The amateur is building respect.
The professional has credibility.
The amateur is credible.
The professional presents well to others.
The amateur is perfecting their presentation.
The professional is characterised, well, as a professional.
The amateur is not.
You have to start almost anything as an amateur.
That doesn’t mean you have to stay there.