Given the expense of private instruction, people will often try to make do with group lessons or even YouTube videos or books, and those approaches will generally work to some degree. But no matter how many times you watch a demonstration in class or on YouTube, you are still going to miss or misunderstand some subtleties—and sometimes some things that are not so subtle—and you are not going to be able to figure out the best ways to fix all of your weaknesses, even if you do spot them.
