Hello Jenna: Awesome job in researching scholarships. I recommend that you apply to all that you are interested in.
Many scholarships will require you to "sign-up and/or write essays". So you may want to get prepared by having your login credentials ready along with a pad and pen. Here are a few sites to help you get started:
FAFSA (Free Application For Federal Student Aid):
Good Luck to You!
There’s a great web site called fastweb.com. Create a profile and start applying.