I've done a few stupid things, but so far I haven't stalled the car or hit the kerb! I've done a few bad things with the gears though, like changing gear from 2nd to 5th, or changing gear but not quite getting it into a gear and so was left in neutral!
It's starting to get a little easier though, the more practice I get. It would be nice to just get used to controlling the car before dealing with other traffic, but I guess that can't be avoided. I will be so pleased when I eventually pass my test; it will definitely be a big achievement!