MT Chat's forum for New MTs is very active and has lots of helpful information in the pinned threads at the top (FAQs, etc.). 
 AAMT "About The Profession" -- Includes sections on Understanding The Profession of MT, Career FAQ, How To Choose An MT School and Tip Sheet For Becoming A Self-Employed, MT.
 Occupational Outlook Handbook information on the career of medical transcription.  Includes earnings information and job outlook for the future.