YOU will have to give a PAN call (normally suspect icing, rough running) and RELAY someone elses MAYDAY, not transmit your own.
It's quite simple really. You just foolow a map. You get planning time. And it's actually really easy because you don't have to think about flying the aircraft. Just having a nice chat with the guy in the next room
Learn MATZ penetration and also SFVR (You get the option at the end to go SVFR or divert)
Good luck!