Dyson is a reach for any unhooked applicant. You are qualified – but Dyson will get more well qualified applicants than it has spots available.
The counselor at your private HS will have the best advice and should know how students from your HS do in terms of admissions results from Dyson.
If Dyson is your top choice and appears affordable then apply and give it your all. But be sure to craft an application list that includes reach, match, and safety schools that you would be excited to attend.