It’s not about special, super special, or plain old interesting.
You want STEM, but list no math-sci ECs, (save for whatever got you to ZR. How much time was that and over what period? With hs peers or ?) That’s.an issue, a big one. You’ll compete with kids who have it all.
Not sure you yet know enough about what tippy top colleges look for. Have you read the MIT blogs and do you know what the main point of the Brown curriculum is? You have a lot of pieces to put together.
And it’s not about weighted gpa.