you didnt mention this but. if you have just started skiing, work on that first. honestly you should be a very proficient normal skier before you ever venture into the park, youll appreciate it later on.
as for once you get into the park. start with the mini hits and small flat boxes, get comfortable sliding sideways, and landing switch off small things etc. 180s over rollers and small kickers and whatnot, progress to threes when you feel comfortable with 1's and stuff.
boxes and rails... whatever you feel comfortable with, once you get flat boxes/rails down pat, you can start trying all sorts of tricks on those, and learning how to just slide more technical features like urban style rails, c's etc.