Which version of AE. If it's CS6 or newer, I would create a shape layer, make it 3D, then change the render engine to 3D(cntl+k then advanced). Then start adding some lights, and a material to use as a reflection/environment map. If you have C4D light, you would get even better results there.
"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.