She needs to open a CollegeBoard account asap.
She needs to research all the universities and liberal arts colleges that offer financial aid (basically a waiver of tuition and room/board). There are lists online. Harvard is not the only one by a long shot. They are all extremely selective universities.
She needs to start writing the sort of compelling personal narrative US universities require of applicants. List hobbies, community service, sports, part-time jobs, and formative experiences. Create a narrative.
You need to look at the CSS Profile, which is the private university and liberal arts school application for financial aid.
Buy yourselves Calleire minutes (or other very cheap international phone minutes) and she needs to call admissions offices/ international student admissions offices of all the universities and colleges on the list of places that offer finaid to international students.
She needs to find out what standardized tests, if any, the universities/ colleges require, and she needs to prepare seriously for them. This would be the SAT or ACT.
She needs to find out details like forwarding her grade transcript, having it standardized if necessary, teacher recommendations (are they needed, how can teachers correctly format and upload recommendations...)
Common App or no? Common App plus individual institution application?
There are big questions and little ones.
NB Financial aid is not the same at all as an NCAA sports scholarship.