YOU SAID:
the day I went for the first time to school was the worst day ever
INTO JAPANESE
初めて学校に行った日は最悪の日だった
BACK INTO ENGLISH
The first day I went to school was the worst day
INTO JAPANESE
学校に行った最初の日は最悪の日だった
BACK INTO ENGLISH
The first day I went to school was the worst day
Well done, yes, well done!