Silkies are extremely difficult to sex before 4-5 mos. of age. If anyone quarantees the sex before then, I would run the other way. If you go to "where am I, where are you," in the social forum - you can locate and post on your state thread. You could ask there, is anyone has silkie hens or point of lay birds.
Also put "Silkie Thread," in the search box - so you can post where experienced breeders can offer the best advice.
Silkies are worth the effort. Welcome to the flock.