At this point you should be able to sense the psi. It could feel like heat, pressure or tingling. When you feel this, move your hands closer together a bit - if there is resistance (even a little) you will know you’re sensing it.
Psi balls can be programmed for pretty much anything. A common use is to get someone’s attention - program the ball to “poke” someone, to let someone know you want to speak to them. The ball can travel long distances to give the message.