This is quite normal for those starting to play soccer, especially girls. I have done the stealing the soccer ball away form the coach drill with a couple teams I have coached that were co-ed teams (they were k/pre-k teams) ... it seemed to help some of them get a little more aggressive, but you don't always see it until probably halfway through the season. For young kids that are more timid, they usually don't want any part of a kid that is bigger and more aggressive even if they have been working on it. The aggressiveness will come, but it will come a lot quicker if she is confident in knowing what she can do with the ball. Working on the kicking, trapping, dribbling, etc is about all you can do at that age ... if she wants to practice when you are at work and noone else can kick with here, have her find a wall and then just kick alternating the foot she kicks with (right, left, right, left ...) this way she can kick and practice trapping or one-touching. One of the next things to work on would be juggling (keeping the ball in the air either kicking with your foot, knees, head) ... although at a young age this isn't too easy to do, but it helps them learn control.