Medicare

• I am about to turn 65 and sign up for Medicare but I’m not sure what my options are for coverage. Where can I go for more information?
• I have Medicare Part A and Part B. I’ve heard about Part C and Part D, but I don’t know what those are. What coverage would they provide that I don't already have?
• How can I switch from Medicare Advantage to traditional Medicare? Is there a form I need to fill out?