Starting an incident management team or IMT sometimes is as simple as "helpful people doing helpful things" or as complex and elaborate as the federally hosted "Complex IMT's"  you see on the news.  The dirty little secret is...ready-or-not, when the big show becomes a home game...your "IMT" is the folks who are in-town, readily available, and leaning in.  You can help them become better prepared for those eventual home games through some training, organization, and exercising.  If folks enjoy the deploying to the "away game," getting started locally provides a strong foundation.  

The good news is that you can get a few folks together, typically from the first responder or emergency management community...share some pizza and start some meaningful conversations around "what-if."  From there, set up a meeting schedule where you work on some training and practicing the "what-if."  Beyond that, dig into some of the additional training and potentially task books.  

This is a small, close-knit community of, as Mr. Rogers would say, "the helpers."  Reach out to each other for mentorship, advice, instruction, and frankly cheerleading from the sidelines by those who have gone before you.