He's a mere 'amateur' when it comes to cooking. [=he doesn't know how to cook well]
She played soccer as an 'amateur' before turning professional.
These photos were taken by both 'amateurs' and professionals.
(..) - Branzino. - George. - Tell us about your day. - Did you catch that spider guy yet? No, we didn't catch him yet. But we will. He's an amateur... ...who's assaulting civilians in the dead of night. He's clumsy, he leaves clues... ...but he's still dangerous. He's assaulting people? (..)2012 The Amazing Spider-Man