How do I get over being prejudiced?

I live in Kentucky which is known for it's KKK rallies and such. My husband is also VERY prejudiced. I don't want to be prejudiced, but it seems like people DO usually fit into the guidelines of what people think of them, that's why they become stereotypes in the first place. But I am working in a professional environment now, where there is a mixture of black and white professionals, and these women do not fit into the category I've always put them in. I hope I am making sense, I don't want to offend anyone or get deleted, because I am really trying to get over being prejudiced, but it's hard to go against what you've been ingrained with all your life. How do I get over it? I'm scared to talk to any of these women because I feel like I have to constantly watch what I say, if I offend them even one bit they'll cry racism and I'll lose my job.