inexperienced

Synonyms: amateur callow fresh green ignorant immature inept inexpert innocent kid naive new prentice raw rookie rude sophomoric spring chicken tenderfoot unaccustomed unacquainted unconversant undisciplined unfamiliar with unfledged unpracticed unschooled unseasoned unsophisticated untrained untried unused unversed unworldly verdant wet behind ears young

Antonyms: educated experienced expert familiar schooled seasoned skilled trained versed