Yes, you want to try to get clay or otherwise natural substrate, which could be found at Home Depot. 4" terra cotta pots are great IME, though some folks have trouble aerating them for hatching and prefer tiles. If you use a tile, I would suggest avoiding glazed finishes that would prevent eggs from attaching.
If you are looking to rear the larvae, you'll do yourself a huge favor by coming to the Breeding and Propagation Workshop. Robin and Jim's presentations will be the best primer possible for getting you ready.
Their core message is that captive breeding of marine ornamentals is easier than ever and can be done at home by the average hobbyist.
In terms of books, I think the two best resources are:
The Complete Illustrated Breeder's Guide to Marine Aquarium Fishes by Matt Wittenrich
Clownfishes: A Guide to Their Captive Care, Breeding & Natural History by Joyce Wilkerson
Wittenrich's book is rife with the most recent information related to captive breeding, including culturing live feeds. However he essentially states that clownfish are adequately covered elsewhere and chooses to focus on all the other species - can't really blame him, but IMO it's not easy to find solid reliable information about clowns when you're first starting out, especially with Wilkerson's book still out of print.
Wilkerson's book is still the definitive clownfish breeding book, and it's easy to relate to her own experiences. The portions of her book regarding nutrition and larvae rearing techniques are rather dated, however, but that's why you also want to have Wittenrich's book.