It's pretty easy. Just talk to the people around you. You'll get more comfortable the more you do it. Say hello to strangers. Talk to kids on the lift, talk to people while waiting for your drop or taking a break. Join in a hiking sesh with some kids. Ask if you can cruise for a lap or two with people.
I'm used to going to places alone and making friends with strangers so it's pretty easy for me now. Even if you just talk to a few people here and there, if you're hanging out in the park at a mountain all the time you'll meet a bunch of people.
If you smoke, roll up a blunt and ask if anyone wants to take a lap up the chair or have a safety meeting in the woulds. IF you drink bring a couple extra beers and share em.
IF you're sober bring a good attitude and just have fun. Everyone likes chill people having fun.
IF you film, get down with filming some peoples. People love footy.
Feel free to ask for tips from somebody who's killing it or doing a trick you want to try, just bullshit with people.
Most people are friendly out there. There are some douches but a lot of friendly people. Fuck, I've even done laps with noobs to help to teach them how to turn on the normal trials or given people trick tips in the park. I feel like there's a lot of friendliness all around in the park.
Skiing isn't all serious business. Have fun. Talk to people, make friends, shred on.
IF you still can't make friends in a month or so I'll take a trip to your mountain(if it's not super far away) and cruise with you, meet people, and then you can be friends with them.