layman-freshman-apprentice

layman
Where the law is concerned, I am only a layman.
谈到法律，我不过是门外汉。
apprentice [əˈprentɪs]
An apprentice is a young person who works for someone in order to learn their skill.
He left school at 15 and trained as an apprentice carpenter.
他15岁辍学，当上木工学徒。