My first anemone was a Sabae and my aquarium was only barely 2 months old. But fully cycled. My friend needed someone to take care of his Sabae and he had no room nor the time. I warned him that my system was very young but he insisted to take the risk.
I drip acclimated it for about an hour before I dropped it in. After about a week, it was comfortably settled. To my surprise, it was healthy! It even took some brine shrimp. It looked so great, he decided to let me have it.
If your system is stable and everything is in check you should be fine. But of course, this was only ONE anemone. Who to say how other species might be react or maybe I was lucky. Who knows. Just to be safe, hold off on the purchase and hopefully some other more experienced reefer might join in.