It’s important to have a strong handstand against the wall before you ever try balancing yourself in the open.
And in order to train that you have to be able to get into the handstand. This video shows you the easiest way to kick-up against the wall.
The most important point is to keep your arms locked the entire time. That makes them strongest and you’ll be least likely to collapse to the ground.If you don’t quite get it on your first attempt keep at it. If you’re worried about injuring yourself put a pillow or something soft beneath your head to build your confidence.
Also, you can have a partner assist you. After you kick they can guide your feet to the wall.
As for how much kick to give, you need enough to get your hips above your body but not so much you plow into the wall. With practice you’ll be able to touch lightly on the wall every time.
Good Luck and Good Hand Balancing,
P.S. This is just the first step of many in the Secrets of the Handstand Quick Start DVD. If you want to work up to balancing on you own this is the DVD to get.