It took me forever to get it too… hand placement is crucial, so is sticking your butt out with a bit of a backbend rather than having a "hollow" body. It's a really weird feeling handstand, it definitely isn't as symmetrical as the other handstands (back to pole, belly on pole). Doing it while facing a mirror also helps a lot, and don't worry too much about getting your legs symmetrical – mine are still kind of askew (in my scorpio my right leg is on the pole – in the handstand, my right leg is pointing more forwards and my left leg is further out to the side) but it's not all that noticeable.