Grammar help for Mandarin sentence

I'm trying to explain what I do for a living. I have a few vocabulary words, but don't know how to turn them into a sentence. I haven't figured out how to do accents yet, so this will be extra cryptic.

"Wo shi jing li hua yan."

In English it would be more specific too. "I work as a manager at a Classical Chinese Garden."

我在一个中国古典花園做經理.     I work as a manager at a Classical Chinese Garden.

我的工作是中国古典花園的經理.  My work is being a manager at a Classical Chinese Garden.

我是个中国古典花園的經理.  I am a manager for a Classical Chinese Garden.

Grammar help for Mandarin sentence

I'm trying to explain what I do for a living. I have a few vocabulary words, but don't know how to turn them into a sentence. I haven't figured out how to do accents yet, so this will be extra cryptic.

"Wo shi jing li hua yan."

In English it would be more specific too. "I work as a manager at a Classical Chinese Garden."

我是中国古典花园的经理。   I work as a manager at a Classical Chinese Garden. 

You may be supposed to use some chinese characters rather than Pinyin.