Not sure if the information you found has come from a reliable website? Browse the material below and apply their recommendations.
From the Suffolk County Community College Library
The following sites can supplement the resources you've already found using the sites listed on the "Start Here" page and searching for books and articles in the library.
Also check the professional associations and organizations of your intended career field.
Look for salary surveys, demographics, career information and other pages/links that might answer some of your questions.
If you don't know the main professional organizations for your career, you can often find them in career articles, for example through the Gale Virtual Reference Library Database (GVRL). Look under the articles tab in this guide on how to search GVRL.