Do some research on the anemone you're interested in, before getting it.
Sebae is a generic term usually referring to one of two species of anemone which are different in both ease of care and the number of clownfish that will use it for a host.
Heteractis crispa is what Sid posted pictures of up above. That is an easier anemone to keep and is accepted by many more clown species than the other which is Heteractis malu.
Clicking on the link in my signature will bring to the resource library section containing info on anemones.
What many people fail to realize is that anemones are more difficult to keep than corals. I dont think there is anything like a "starter anemone" but if there was, I would guess the bubble tip anemone,(often abbreviated as BTA, E.quadricolor) would be it.
Look them all up and find which one fits your system, requirements, and experiance level best.
Nick