I'm stunned, and delighted. And really really impressed.
Three thoughts that might help.
1. Don't go too big right away. It's critical not to lose motivation through injury from over-motivation. Take your time, and be steady--with rest periods in between workouts.
2. Do thorough workouts over time. Do many different things to round it out: weights, stretches, bike, walk, hike, fun stuff. A trainer putting together a program is not a bad idea.
3. There will be a fade point when the original excitement wears off a bit. During that time you will want to quit. Here is where you need to be incredibly disciplined. Once through this stage, the fitness routines become important parts of your day that you look forward too.
I'm really proud of y'all. You saw the skier you could be with just a little better fitness level. Now you can become it!