a bit previous adolescent advanced amateur amateurish at half cock callow dabbling dilettante dilettantish far ahead fledgling forward green half-assed half-baked half-grown hasty ill-considered ill-digested immature impubic impulsive juvenile not firm overhasty oversoon precipitate precocious premature previous raw rushed sciolistic shallow smattering sophomoric superficial too early too soon uncrystallized underripe unfledged ungrown unjelled unmatured unmeditated unmellowed unpremeditated unprepared unripe unseasoned untimely