for fuzzier shadows increase shadow rays and the light angle in the raytrace shadows part of your lights
i can't help you with the depth of field though since i havent seen where you set that up and i would think it easier to do in post
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D