Practice against a wall with tennis balls, it’ll take a day.
I don't recommend tennis balls for a beginner: they bounce everywhere, and you'll spend most of your time chasing the balls rather than juggling. Cheap juggling balls are around 10$.
I don't recommend tennis balls for a beginner: they bounce everywhere, and you'll spend most of your time chasing the balls rather than juggling. Cheap juggling balls are around 10$.