Your lighting does not look that bad at all, at least you're exposing your shots properly. If anything, you can mess with your on-camera white balance to compensate for the yellow tint (which I now realize that is a gold train right?). If you are trying to get more of the shot in focus, increase your aperture and slow your shutter speed. This will increase your depth of field and should achieve what you're going for. Note that as you increase your f-stop more, your shutter speed has to get slower to get the exposure right. This just means you'll want a tripod or something to stabilize your camera to avoid motion blur. Hope this helps and I look forward to seeing your next results.