Get twin tips. They are so numerous and you can find a pretty decent pair, new or used, CHEAP.
I started off skiing park years ago on bloody, stiff-as-fuck directional atomics. While I was able to learn a lot, switch shit, rails, etc, the skis were a barrier to my park enjoyment and growth. There were times that I snagged those tails and fuck it doesn't take much for that to hurt a lot. Also, directional skis, by their constrcution and mounting pioint, will react differenlly to the snow and your body, negatively forcing you to do more with your body that wouldn't even be necessary with a well mounted pair of twin tips.