YOU SAID:
I started college in the summer of 2018.
INTO JAPANESE
私は2018年の夏に大学に入学しました。
BACK INTO ENGLISH
I entered college in the summer of 2018.
INTO JAPANESE
私は2018年の夏に大学に入学しました。
BACK INTO ENGLISH
I entered college in the summer of 2018.
That didn't even make that much sense in English.