Plan A: admission at highly competitive college in the US
Realize it’s a reach so you need backup plans. Plan B and plan C may be swapped depending on your personal preference:
Plan B: admission to (maybe significantly) less competitive US college that will give you aid
Plan C: attend very good university at home for undergrad (I presume you’d have no problem getting into IIT), knock it out the park, get into good US college for graduate school. Many talented and bright students from developing countries find this is the easier route as it is much easier getting admitted (and getting funded) for grad school in the US than undergrad.