I like both. Just be careful. I would put the light clothes on a slightly darker background and the darker, colored clothes on a white background. If you can, try to lighten the photos too. It helps to have bright pictures.
One other tip, is to only list one or two items a day. Since you are just getting things listed I would post one in the morning, one in the afternoon, and maybe another in the evening. If you are posting more than one thing a day, try to space it out. After you get about 25 things, try to only post one or maybe two things a day. Good luck!