The web sites listed are good places to find information on a profession, occupation, and/or career.
WOIS is a good site to explore. You can sign up for added features but there is a cost. You can also find information on a particular occupation or profession and follow the links to occupation organizations. There you can get a feel for the writing in that area. Enter a job in the Search Career Information box. Then find how the variety of jobs under that title, select one to find a wealth of information. At the bottom of the chosen page are organizations for that profession, a good place to read materials in that field.
The Occupational Outlook Handbookfrom the U.S. Department of Labor, is easy to use. It is updated annually and is free to the public.
These web sites have basic career information. Some have links to professional organizations and many of those organziations have materials written for members.