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.
Unsophisticated; clumsy or obvious.
Straightforward, candid, open, and frank.
Naive and trusting.
Demonstrating childlike simplicity.
Unable to mask one's feelings.