YOU SAID:

Hey, I'm really anxious about doing this.

INTO JAPANESE

こんにちは、私はこれを行うことが本当に心配です。

BACK INTO ENGLISH

Hi, I'm really worried about doing this.

INTO JAPANESE

こんにちは、私はこれをするのが本当に心配です。

BACK INTO ENGLISH

Hi, I'm really worried about doing this.