I assume you will be applying next year for 2018-2019? The application deadline for many scholarships is almost here. This is very late to be starting the application process for fall of 2018 if you need financial aid.
And being able to pay less than $15,000 means you will need significant financial aid (for international students to costs are closer to $50,000+ per year)
Read through this forum for ideas where students are applying. Learn the difference between “merit aid” and “need based aid” and about need-blind or need-aware schools, and learn which schools guarantee to meet need. These are all important concepts to understand as you begin the application process.
Once you have your SAT scores, look for schools where your stats put you in the upper 25% (this info is available on each school’s website under ‘freshman class profile’) Note that many selective private schools (ones also with the best financial aid) expect/require students to have SATII scores as well.