Unless you've had experience with that sort of thing, trying to learn on a pair of skis that you need to ski on isn't the greatest idea.  I think your best bet would be to go to shop and have them look at it.  If they're cool, they show you how to do that sort of stuff.  If your that short on cash to, talk to one of the techs and you might be able to work something out as a side job with him for cheaper.