Kenya trees are an excellent choice for a beginner coral and were actually one of my first coral. What kind of lighting do you have? I ran some MH on mine for a while and they did ok, but once I switched to t5s there was a noticeable difference in health, and it was in a good way. Keep them in some moderate to heavy flow, but don't put flow directly on them. They will also grow like a weed once they get going.
I believe the biggest thing to practice when you start getting into corals is keep your water conditions stable. Your salinity doesn't have to be precisely at 1.026 or 25, mine is sitting at 1.027, but because I keep it stable there my corals do fine.