keep in mind that for the best results you should always clear your mind of thoughts while manipulating energy, solely feeling your energy.
you need to have constant focus on your psiball to continue feeling it, just dont expect anything that feels like a physical thing because it's simply not physical, the feeling is more like pushing two magnets towards one another.
meditating and practicing your mind to be in a state of no thoughts is very imporntant.
in my opinnion a person is considered good at manipulating his inner energy when he gets to a point that he can feel any part of his body (no matter what size he chooses) without touching his body.
you can find out your energy color, and move on to shaping other things with your energy (all described in the link i gave you)
let me know if you have any questions.