Many experts think inline skating is the closest dryland training to alpine skiing. I've used inline skates for several years and would advise the following:
1) get long-track "speed" type skates, 4 or 5 wheels. You don't need hockey or rockered skates unless you're a park skier.
2) match your equipment to conditions. If you've got a bike path then a pair of wrist guards is all you'll need, and your skate wheels can be hard (they've got a durometer rating on them). I skate on the street, on some pretty rough asphalt sometimes, so I go the whole nine yards: helmet, wrist guards, knee and elbow pads. Wheels have a medium (78A) durometer rating. Soft wheels take debris-bumps easier and corner stickier, but wear faster and aren't as speedy. K2's been good for me, warrantied first pair with exchange upgrade.
3) Learn to stop. Keep your weight forward. Don't fall backwards! Broken collarbone preferable to broken tailbone or torn rotator cuff.
4) Once you're safe, find a hill, set up some cones, and slalom away, even use poles.
5) Make like a speed skater and it's great abductor/adductor work.
Einstein was right: the faster you go, the slower you age.