FWIW my first big mountain experience was Whistler and we got absolutely dumped on. So was definitely a new experience. I had been riding for a while and was about your age. It was huge, expansive and overwhelming... but it was a blast.
Now of course the snow had something to do with it.. but we brushed up pretty hard on the mountain before hand, read everything we could and as a friendly affable bunch, chatted up with locals in the least possible annoying manner to seek advice on best way to tackle the mountain.
I thought we managed fine.. our last day we even had a dude bring us to the peak chair perfectly timed before word spread that it was opening.
The only other thing I would mention is getting there... direct flights out of newark to jhole this year, not bad. Looking into heading that way for the first time myself.. just wish i was completely healthy.