I love Millbrook, and it certainly should be on the OP’s radar, but I am not as certain of the OP’s chances. Plus, they do not have a huge financial aid budget.
A school I would give serious consideration to – one of the wealthiest in the world, and entirely free – is the Milton Hershey School in Hershey, Pennsylvania.
You have been through a lot, OP, and this school is expert at dealing with bright kids who’ve had to overcome a lot to just survive. It would be good to be at a place that understands what you’ve been through.
You have a gift for writing as well, which jumps out. Good luck to you.