The best source of information about what the Navy does is a Navy recruiter. Go to the Navy's website and click on Locate A Recruiter and set up a meeting.
The ultimate authority on what the U.S. Navy does/doesn't do is a Navy recruiter. Go to the Navy's website and click on "located a recruiter," and make an appointment.
The Navy accepts Coast Guard service since they are both branches of the United States Military, however, officers may belittle you for the prior service.