Hi Pablo,
There is no reason why Harvard or any other ivy league school would be out of reach! It sounds like you would be a great candidate for admission and scholarships because of your high GPA and AP classes.
The best way to get information about schools is to visit the "Undergraduate Admission" section of the school's website. If you can, it would be really great to apply by the Early Decision deadline, which would also make you eligible for more scholarships. I would suggest that you begin working on your application(s) as soon as possible to give yourself enough time to compile all the materials that you need and write your application essay(s). Make sure to find at least two people who can help you edit your essay(s). I would suggest going to a teacher at your school, a mentor, or any other professionals you may know.
While most colleges will take your GPA into high consideration, they also like to see how "active" you are within your school and/or community. Especially the more selective schools want to know that you are not only focusing on your grades but managing your time with other activities. Make sure to point out any clubs or sports teams you are a member of and any volunteering that you may do.
In regard to scholarships, there are some websites that provide you with a list of available scholarships which makes it a little easier than searching everywhere. I would suggest visiting www.scholarships.com, www.fastweb.com, and www.finaid.org. Also, make sure to go to the "Resources" tab (under our main page). Scroll down and click on the "Scholarships and Financial Aid" link. This will give you links to many organizations and websites that offer scholarships.
One other resource is the financial aid office at the college to which you are applying. They can let you know of scholarships or grants that you may qualify for and give you information on how to apply for them. Many alumni give money back to the school to be distributed in scholarship form to students. Sometimes they specify a certain major (education, business, etc.) and sometimes they specify that the scholarship is need-based or for Latinos or other ethnic groups. Make sure you complete your FAFSA early and apply for scholarships early to up your chances of getting financial aid.
I hope this was helpful. Best of luck with everything!
-Amber George