Have you read up? There's great videos on youtube:
The Climbing Tools videos are good too:
Be aware that self-arrest in crampons is different than without, often not emphasized in the literature. Basically, if you get speed, dont dare let them dig in or you will be tumbling. Use knees instead.
If crossing unexpected firmness, you may be getting out the axe while skipping the crampons. Faster, and can be awkward to try and get your crampons mid-slope. ( So get them on before you need them, if possible.) So there will likely be times you want to be able to arrest without the crampons as well. In that case, digging in your feet is preferable.
Have you done boot glissading? You are looking for a similar type of slope with a LONG SAFE RUNOUT at the bottom. No rocks just beneath the snow. No trees or other obstacles anywhere near your fall line. A perfect area will reduce your anxiety immensely. Inspect it on the way up.
Here, typically pass areas near the highway are where people run classes. Try to find a slope with a variety of aspect (sun exposure) and angles.
Heartily recommended: COVER THE SPIKE. Tape over your spike guard or some hose folded over it might work too.
When we practiced, we went blindfolded and walked by a line of people that one would push you off. Practice with falling on your back, pick, and flip over. With a pack, etc.
And oh yeah if you have elbow or knee pads, like for soccer or anything, that can be nice if it is pretty firm.
Hey ask these guys: