初出茅庐

初出茅廬
chūchūmáolú
  1. venturing from one's thatched hut for the first time (idiom)
  2. young and inexperienced
  3. novice
  4. greenhorn

CEDICT

to have just begun one's career without any experience

Wiktionary

东汉末年，诸葛亮隐居南阳，刘备三顾茅庐，竭诚聘请诸葛亮协助其兴复汉室。诸葛亮才出山就大败曹操的军队。见《三国演义．第三十九回》。后比喻初入社会，缺乏历练。

重編國語辭典

刚入社会，历练不深

維基詞典

Entry Composition

1 初 chū
  1. at first
  2. (at the) beginning
  3. first
  4. junior
  5. basic
=2 出 chū
  1. to go out; to come out
  2. to arise; to occur
  3. to produce; to yield
  4. to go beyond; to exceed
  5. (used after a verb to indicate an outward direction or a positive result)
  6. classifier for dramas, plays, operas etc
=2 出 chū variant of 出 chū (classifier for plays or chapters of classical novels)
3 茅庐 máolú thatched cottage

Related entries

青涩 qīngsè
  1. underripe
  2. (fig.) young and inexperienced
生手 shēngshǒu
  1. novice
  2. new hand
  3. sb new to a job
新手 xīnshǒu
  1. new hand
  2. novice
  3. raw recruit
她买了新手套。

She bought new gloves.

Source: Tatoeba

外教 wàijiào
  1. foreign teacher (abbr. for 外国教师)
  2. greenhorn
  3. novice
  4. amateurish
  5. religion other than Buddhism (term used by Buddhists)
新丁 xīndīng
  1. new addition to a family (i.e. a birth)
  2. a boy who has just come of age
  3. (in a job etc) newcomer
  4. novice