I was on Facebook earlier and stumbled across this link for Usher's online class that will teach the art of performance.
I thought it was interesting so I clicked on it and it took me to the masterclass website.
"Usher teaches you how to become a great performer. In his first ever online class, he teaches you the technical skills, career lessons and breakthrough advice that he has used to captivate audiences and sell out arenas for over 25 years."
How effective this is? Not sure but, it doesn't hurt to check it out, especially if it is only for $90.