YOU SAID:
i'm not sure i wanna go to this party
INTO JAPANESE
私はこのパーティーに行きたいか分からない
BACK INTO ENGLISH
I don't know if I want to go to this party
INTO JAPANESE
私はこのパーティーに行きたいかどうかは知らない
BACK INTO ENGLISH
I don't know if I want to go to this party
That didn't even make that much sense in English.