I try to find good homes for three homeless kittens that I found in the street? could you give me ideas please

Well I live in Mexico, one of them is black, I am a little worried cause you know that there's a lot of superstitious people that believes in black magic and I don't want this kind of end to my baby and her sisters are siamese, I would like to find a nice family for the adoption, it happened to me a year ago that a woman was trying to sell a beautiful cat that I gave her, I saw in internet, I would like to find a family who loves animals not for their race but for the infinite love and joy that they bring to our lives, please tell me what should I ask if someone call me to detect if is the right person? Thanks a lot, merci a l'avance