Before you worry about raising clownfish, focus on getting a pair that is breeding. Once they start they should continue to breed on about a 14 day cycle. Do not be to concerned if you cant raise the first batch of eggs.
Start researching now like sport said and learn what you can. But until your clowns start breeding, worrying about how to raise them isn't to much of a concern. My clowns have been paired for quite some time but do not breed yet.