I was getting code P0300 random cylinder misfire. Did a compression check found #2 cylinder no compression. Pulled the valve cover found the first and last rocker arms fell off. What do I need to do next?

 

I'm assuming you have a 4.7 because that's the only time I've heard a rocker arm fall off.

As to what to do next? Put it back on! LoL

Seriously though, put it on and rotate the engine to articulate the valve train and check for any looseness or excessive wear