Few things that will help you have a better game experience.
1. https://dayz.ginfo.gg/#c=-12;62;3 + a compass = proper navigation. In time you will not need a map and a compass bcos you will learn the map but for now use that.
2. Looting a radio is fairly easy however you need patience.
3. I should have started with this. First step to properly play day z is to learn how to kill yourself (its super easy punch with rags in your hand then press f11 and then g never let go of your left mouse button). Ask for somebody to show you in game.
4. never panic, and if somebody starts shooting at you dont go like WOMGMOMWOGMOG MY GEAR FRIENDLY FRENDLI FRENDLIIIIIIIIIII BRO WTF I DIDNT DU NOFING. If they already started shooting at you, they most likely looking to pvp, shoot them back. Keep this in mind in day z its just a matter of time till you lose all your shit, so you might aswell engage in a pvp fight to get more experienced.
5. i like this one the most. If you get the chance strap ppl down, take their gear if u want to, but don't kill them, interact.