Engine problem

It's a 73 duster 225 3.7l. Also I did a compression test today on the first cylinder and it wasn't pushing any compression. Took of the valve cover and the first 2 rocker arms are loose, they move side to side but the rest don't. Is their a way I can adjust them so they are not as loose? I can also hear the leak coming from that valve, so it's getting out of their somehow

Btw the engine does turn over and run, I made sure the plugs are in the right spot, so that isn't the issue. I also changed the dis. Cap, as well as the rotor.

I know I'm frustrating with the lack of info. sometimes that is my fault!