Well, some may knock Shawnee but if you have only been boarding 3 times, Shawnee is a good place to learn at. Definitely no terrain I would consider hard, no steep pitches to speak of really. It does have good greens and blues to learn on and although not much of a pitch, there really aren't any completely flat spots that you might get stuck on and have to skate around. Then it has few very short blacks that you can dabble around on before you outgrow it.
Plus with a student ID you can get a lift ticket at Shawnee that lasts from like 8:30 am to 9 pm. Once you get more experience it will seem real tame though. I prefer Blue or Elk. I don't really hit the parks at all though, more freeride. If your willing for a bit more of a drive the Catskills will offer a bit more challenge after the Poconos.