Ask your local ssa for giving you the medicare booket but if you want to ask more question. Ask your health dept who handles medicare, not SSA.
Are you working? And you said you will be aged in so it means age 65. If youre working and have insurnace then you can get part A for free. However Part B can put on hold if youre working and have already had insurance. Im not familiar with part C. The best thing is to contact with the health dept to handle with medicare. Good luck.