No, there's no way you're going to transfer data from WO3 to SE. Not even if they were the same region is such a thing possible. The save file for SE is twice as big as the save file for WO3, they're THAT different. So you can quit holding your breath on that one.

If you can't beat WO3, there's no way you'll beat SE. SE is _even_bigger_(!).
Twice the size, at the very least.
I got through WO3 with a lot of invested time, I'm _still_ not through SE. I might even say that SE is twice as hard to get through as WO3. Those classic tracks are different enough from their original incarnations that previous experience really isn't much of a factor. So just cause you were able to beat the classic tracks when they were WO1 and WOXL tracks, that doesn't mean you'll have an easy time of it in SE. Sorry.

You don't need the seperate memory card to do Time Trial, that's just to save your ghost on. Just "cancel" and it won't save a ghost file, that's all there is to it. Now you can practice all you need in Time Trial, that should solve half your problems right there! 8 )

As to what happens when you beat the game, that's an often asked question!
Have a look just two topics down from this one and you'll see a couple things.

Short answer: Nothing.

The game, WO3, is a gargantuan challenge that only the most devout wiper can surmount. My only advice to you is that while it looks nearly impossible right now, it is not. And when (not if, WHEN) you come out the other side, having filled your entire screen with golds 4 times over and having beaten all the tournaments and challenges and even mastered all the prototypes... You will be a better pilot by great leaps and bounds.

As I've said for a long time, WOXL is the hot girl you have an amazing fling with, WO3 is the long-term relationship girl that you think you might spend forever with.