Your chances are better than most, but still it’s a reach. Harvard accepted fewer than 2000 applicants this year from more than 40,000 applications. That’s an acceptance rate of less than 5%.
Since the vast majority of those who apply are top of their class or close to it, many of those rejected look just like you. I know a kid with straight A’s, perfect test scores, and a legacy. Wait listed.
So, take a shot, but know that it’s a long shot (10%?) and have a backup plan.