Amateurish, unprofessional, unpolished, juvenile.
Of inferior quality.
A professional sports association at the lower levels of minor league organization.
A low-ranking or inferior level among groups, professions, organizations, etc.
Lacking worldly experience, wisdom, or judgement; unsophisticated.
Produced in a simple, childlike style, deliberately rejecting sophisticated techniques.
Intuitive; designed to follow the way ordinary people approach a problem.
Not having been exposed to something.
A naive person; a greenhorn.