I searched for many phone numbers online. Just call the number and ask where you can get in contact with the department that reviews the applications. Once you have contacted the department, ask if they have received your resume and if are currently reviewing it. Make sure you are very clear on the phone and state your name. Some companies won't even give you that.
Many companies take students as interns usually after their junior year.
It often serves as recruitment process for the company. Now, sometimes those two qualities aren't quite enough. Often, you would greater benefit from having a guide. Below are some helpful books for teen projects.