the most important skill you need to learn how to juggle or anything in life is the skill to not give up and pick up every time you drop. The second most important skill is to practice in a way that builds progression on progression, doesn't set you up for failure and frustration but for small attainable goals that work your way up the difficulty ladder. Every large goal attained in history has been a chain of smaller achievements leading up to that point.

With these two "skills" and the help of tons of online tutorials you can get started without having to pay someone to teach you how to juggle. If coach Bob's youtube tutorials couldn't teach you, what value would a real life coach add? Would he or she need to motivate you to pick up the balls you dropped and try again? Angrily ask you why you didn't show up last time or didn't do the exercises you were asked to do? Tell you to keep your elbows in, relax, focus and keep your back straight? Try not to make the balls colide? Tell you to take a step back to fewer ball/ lead-up exercises when you're clearly not ready for a trick? It seems a real life coach would only compensate for you not mastering the first two most important skills, but If you want to pay someone for that, be my guest.