How to be a better dancer?

I recently dislocated my knee because of dance, and I'm slowly starting to get back into dancing again, anyways, I wanted to get better at dance i.e. get better at turns, have more balance, perfect my leaps, but without going to professional classes, so is that even possible? To become a good dancer without the training? And what are some ways I could get better? Any sort of advise would really help me! Thanks!