Replying to I suck at park skiing and don't know how to progress

I've been skiing for 4 years but havent really gotten into a ton of park, more of an all mountain skier. I wish i was better at it but all i can do now is 180, 360, slide boxes and land switch, and "attempt" basic rails. Im confident on my skis everywhere on the mountain but once I get to the park I just lose confidence. I think one of the reasons is I dont want to make a fool of myself and try new things in the park while theres a ton of people, which is all the time. Also, none of my friends ski in the park so when I do, I'm the only once who knows anything out of my friends, or I'm in there by myself, so basically I'm teaching myself. Any help or suggestions on how to get confidence and progress this season would be greatly appreciated