Keywords: learner, novice, green (inexperienced)
As a Noun
1. Someone who is learning how to do something, especially drive a vehicle. English = learner.
2. Someone who is not experienced at a job or activity they are doing. English = novice.
As a Verb or Adjective
1. Of a person, to have very little experience at something, especially because you are young. Idiomatic English = (be) green.