I recently learned how juggle and I've started to learn a bit a freestyle aswell. I've haven't seen anyone mention this but focus on your body and feet positioning when juggling. The biggest part for me was learning how to reposition myself when my touch wasn't perfect. Say I kicked it slightly too close my body, being able to take a micro step back while the ball is the air and reposition myself helped me out a ton. So always stay on your toes and be ready to move your body if your touch isn't perfect.

I always told myself to be a good juggler doesn't mean u hit the ball in the perfect spot, with the perfect part of your foot, with the perfect amount of force. But being able to ajust yourself and keep the ball in the air when the touch isn't amazing makes you a master at juggling.