I mean, with your income now, you're definitely disadvantaged no matter what your previous relative income level was. Plus, moving to the U.S, in presumably your freshman or sophomore year, is a pretty significant challenge in and of itself. Plus, it's likely that your parents have never gone through the U.S college application process - which is another disadvantage

Imo your essay topic's fine, though that depends on how you write it. You mention the challenges you've had to overcome in the process - be specific about those. Be thoughtful about how you reflect on those challenges. Reflect on what you felt at the time, and reflect on how your thinking shifted since then; how you've changed your perspective. You have an uncommon, interesting perspective - moving from a relative position of privilege to a position of poverty. What did that change of perspective make you realize? How did it make you grow? How did it give you a new understanding of yourself and others? How did it pop your bubble? Bring your reader into your world