I must point out a difference with throwing a trick and understanding a trick. Let me explain what I mean by understanding.
Can you throw a 360? great! Now can you grab that rotation in 6 different ways? Maybe not? here is my point, throwing a trick down and hoping it will work will give you that feeling of unstableness. Its the same when you attempt a new trick without practicing in a safe environment. That feeling will induce that "rush and finish the trick" panic feeling, in turn loosing spacial orientation, thus fucking up your trick. When a trick is smooth 9 times out of 10, you own it.
If it feels wrong, go back to the basics. Master an easier trick before working it up.
Now let me tell you about simulation. They can only approach a feeling. Being on a real pair of skis, on snow changes everything. When I was training in moguls on the water ramps, I thought the season will be a breeze to start, having skied all summer. to my surprise, the skiing is different; I had to relearn to ski. So here is my point, tramps are worth shit. The are a starting point in a training program, not a way to perfect tricks on skis.
All I can give for advice is ride with other people, in different terrain. Seeing different set ups, feeling different angles gives you a crapload of experience and confidence. Remember to have fun, throwing down everyday only rises the probability of getting hurt.