unpracticed (adj.)

• callow
• fresh
• green
• ignorant
• immature
• inexperienced
• raw
• rusty
• unaccustomed
• undeveloped
• unfledged
• unhardened
• unproved
• unripe
• unseasoned
• untested
• untrained
• untried
• unused
• unversed
• unwonted
• weaned