YOU SAID:

I'm really not in the mood for doing anything today.

INTO JAPANESE

今日は何もする気がない。

BACK INTO ENGLISH

I have no intention of doing anything today.

INTO JAPANESE

今日は何もするつもりはありません。

BACK INTO ENGLISH

I'm not going to do anything today.

INTO JAPANESE

今日は何もしません。

BACK INTO ENGLISH

I won't do anything today.

INTO JAPANESE

今日は何もしません。

BACK INTO ENGLISH

I won't do anything today.