Yeah, I can't seem to juggle very well. My right foot has little control. Whenever I hit the ball, it always spins back towards me, instead of going straight up.
Learning to juggle is all about practicing. I was never good at it until about 3 months ago when i started juggling about everyday. I went from being able to juggle about 10 times to being able to juggle about 50+ times and im still juggling every day and improving. My advice is just to juggle as much as you can every day and you'll find yourself improving a lot pretty quickly. Hope this helps.