For Medics, Nothing really need explanation. Here is two guides to help understand Medic RP and the Do's and Don'ts.
https://docs.google.com/document/d/1G91-90c3nMATobGrfgI7GH78Pz_KcUMLPrCHp-3Odhg/edithttps://docs.google.com/document/d/1iq2q17IZrEsJcxAo-4cZHB6pLeOJ7Wb-NU3D8kXHos4/edit