I very much agree with you. Also I feel the same way with and without pressure, it's something I am focusing on improving right now, to be able to perform on stage just like I do at home when nobody's watching. This is also why I enjoy writing a lot, I can express myself freely and get in a flow. I'd love to get some tips from you on online instructing, vlogging, speaking. Feel free to reach out @mrs.steemit (steemit.chat).
The book definitely provides useful information, but I think it really performance is an art that takes practice. Thanks for sharing your p.o.v!