No problem. You’ve still got every chance. Studying at a less reputable school means that it’s easier for you to stand out amongst your peers (top universities value you being the #1 student within your school) and they appreciate the unique background you have.

The biggest disadvantage I see is that at a lesser school you’re not likely to perform as well - less competition and academic resources (scholarship training, higher level classes, teacher experience teaching a high level). To get accepted into a school, you’re still going to have to reach/be in the vicinity of their absolute standard. This means if you’re at a school where the second best student is getting a merit endorsement in level 3, you’re still going to have to motivate yourself and find a way to be in the region of a premier scholarship award if you want to get into Harvard.

I was accepted to Harvard and Stanford and won the Robertson from Lindisfarne College in Hawkes Bay, a school that’d only had two people study in the states in our history (and they went to play soccer in Oklahoma or something). Lindisfarne is a great school - we just don’t a history of students applying abroad. Admissions teams definitely hadn’t heard of Lindisfarne before my application, but they were willing to take me despite it being a clear “top school” (that a lot of students come out of). This to show proof that you don’t need to come from a classically top school to get into U.S. universities.

Hope that’s helpful, I’m more than happy to be more specific if you message me directly.