Just my observation, the more time you have spent skiing, the harder
it is to pick up snowboarding.
Why?
Well of course you wouldn't know, YOU weren't an advanced skiier
trying snowboarding!
I skied well over 400days before trying snowboarding. Mainly 4 years
of season's passes to Squaw, hanging with the mid '70's bump team,
easily non stopped WestFace when it's volkwagan sized moguls. Have
nonstoped Gunbarrel, but that's max for my aerobics.
Quit for a few years, gear got outdated, then got a job at a
windsurf/snowboard shop. Guess what, you gotta be able to snowboard to
sell snowboard gear!
I crashed and caught edges whole 2 hour first day.
A week later, second day at BearValley, could ride the whole upper
mountain without falling, including some remedial moguls off the
ridges.
Once again, my surfing friends learn snowboarding much faster than I
did. They could ride most of intermediate resorts the first few
runs....EVER! That's because they don't need to face forward in snow,
they face sideways surfing all the time!
A skier has a natural tendency to face straight down the hill and
angulate the lower body to go across the hill, you know, fall line
skiing.
That's not how snowboarding is done until you get past the beginner
stage.