As others have mentioned, BTAs are great starter anemones. Once you are comfortable, you can move into some of the harder-to-keep anemones (assuming your tank parameters are ideal for anemones). The natural hosts of ocellaris tend to be these harder to keep varieties -- H. magnifica, S. gigantea, and S. mertensii. The trick to these three is finding a healthy specimen, or finding one at all, in the case of S. mertensii.