1500+ means you’ll be in the top 1% of all test takers in the US. There are thousands of kids who study for months with tutors who cant crack 1500, despite 4 or 5 attempts.
Effort does not necessarily translate to a 1500+. You have to be an exceptional standardized test taker. And many of the top SAT scorers are taking AP BC calculus in high school.
You can get a high score without calculus but the math questions are tricky and you can only miss a few questions.
Good luck and hope you get in to the school of your dreams.