after a few min of trials and tribulations with the tennis ball, with it falling out of your hand every so often, i see that you've mastered that. alright, now make it pop.
and then after you pop it, try forming the rasengan into your palm by focusing your chakra into the hand you practiced with, and then make the focused chakra into a rotating sphere of chakra. ^^
and then after you pop it, try forming the rasengan into your palm by focusing your chakra into the hand you practiced with, and then make the focused chakra into a rotating sphere of chakra. ^^