Sat Nam! (Literally "Truth Name"--a Sikh greeting)

Nonfiction Book Proposals by Elizabeth Lyons gives a rundown on the basics.

Platform means more than having a place to promote the book; it means having a readership. The fact that you're an instructor may be important if you (and the publishers) can sell the book to students and market it to other improv teachers.

Blessings,

Siri Kirpal