You don't need to put an anemone in a 14g biocube. Sorry. 55g MINIMUM on EXPERT level care. You may be able to get an anemone and it last three to six months, but it will DIE. There is NO LONG TERM care for an anemone in a 14g tank. You will basically KILL it INTENTIONALLY after reading this post.
The one anemone that regularly hosts ocellaris percula is H. Magnifica anemones, which get about 12 to 18" in diameter, require a high amount of light and a high amount of food, which is absolutely unsustainable in such a small aquarium.
For a small tank like what you have I would recommend a shimp and goby pair. There are several YouTube videos which you should watch. They make interesting pairs.