I'm trying to get into game asset creating, but it's proving to be a daunting task. Are there any good sources of free information out there?

that's not the question though. I made a simple exploding canister in Maya. It contains a cylander type object, with another on on top, with the tops extruded.. I combined the mesh, exported into OBJ. When I loaded the file into zbrush I got a message saying the object contains so many non standard polygons. How do I go about fixing this in Maya?