keeping clown fish is not that hard, however, to keep anemones successfully, you need a reef tank setup, as they have demands for high light, decent water flow, and most major and minor "reef"
trace elements.
i would recommend the anemone podcast episode to get a bit more information on them.
that said, i would recommend at least a 29/30 gallon tank, setup in a proper "rref tanks setup"
im not sure how much more detailed information you are looking for, but make sure you check out the past podcast episodes as i discuss many of these topics, substrates, water flow, some chemical stuff, filtration, and so on.
