HELLO!I AM PREPARING FCE AND I HAVE THIS EXAM 19TH JUNE. I HAVE DONE SOME EXERCISES BUT THE ANSWERS ARE DIFFERENT. COULD YOU PLEASE TELL ME IF THIS SENTENCE IS CORRECT?

"You will soon be a good driver if you follow my advice"said the instructor.

The answer of the book is: The instructor said I would soon drive well if I follow his advice

My answer: The instructor said I would become a good driver if I followed his advice.