Let me add something. There’s a way to make yourself more attractive, sure. But right now, you have no idea what that is. Or what they want. Have you even researched these schools yet?
It’s like you’re looking only at the binary, “Could I get in, is it worth applying?” What you’d need is a savvy strategy. And you don’t get there by asking about bringing up grades. Nor assuming a new internship is it.
Please dig in, learn about these colleges from them, what they say and show, the sorts of kids they seek. Then, we can help you refine your approach, if interested in these schools. Right now, I don’t think you even know if you’re truly interested in them.