make a fresh start is correct because turn over a new leaf means to make a fresh start or change one's behavior for the better.

This idiom or phrase is useful because it helps students understand the intended meaning beyond the individual words.

Examples: After years of laziness, he turned over a new leaf and worked hard. She turned over a new leaf by becoming more honest and responsible.

The idiom is usually about personal change or improvement, not inventing history or creating excitement.