If your school doesn’t normally send students to college in the US, have a chat with the counselors at the closest advising center of EducationUSA or AMIDEAST. They are familiar with the local secondary schools and can help you learn more about the process of getting in and getting money here. They also will be delighted to work with a US citizen who has a few more options (such as filing for US federal financial aid with the FAFSA), and no need to get a student visa.
https://educationusa.state.gov/
http://www.amideast.org/