Two words: Don't panic. You said you've watched Frankie, so if somebody comes at you and puts you in a situation where you have to do a specific thing, DON'T PANIC and do what you have to do, otherwise you'll die like the other nuts on his videos. Other than that, conserve supplies and have fun!

In that case, players should move to a solid object with some cover. Players should also make sure there is cover near them and try not to run in open fields.

Sorry to hear about your death, man, just take a break for a bit if you don't wanna run back to obtain your gear, then start playing again. :) I agree with what Disorder said, go play a bit of original ArmA II: Operation Arrowhead and get used to the controls, inventory system and firing the firearms.