He is a fledgling writer.

他是个初出茅庐的作家。

youdao

I was a fledgling writer at the time of our introduction, just about to publish my first novel.

我们自我介绍的时候，我是个初出茅庐的写手，当时正筹划出版我的第一本小说。

youdao

Silly games, a bare-boned word processor that helped me become a fledgling writer, and a machine to play around on and tinker with that helped shape a part of who I was as a person by shaping what I enjoyed to spend my time doing.

FORBES: Connect