Each of those colleges will have a financial aid page on their websites, probably with a link to the various scholarships. CAREFULLY read every one of those pages. Some colleges will require a separate application for scholarships, some will not. Or a college may require an application for some scholarships, and not for others (in other words, your application to the school may also serve as the application for some scholarships).
The websites should also have deadlines for any applications required. If there's no date given, get in it now.