I'm pretty sure Mitch Love is going to get his opportunity soon. This is the best pick I know of if you're looking at 1st timers for an NHL head coach.
Love has been super successful in the WHL, AHL, and is currently an assistant in Washington. From what I can tell based on some quick online sleuthing, he focuses on the defense. And he's had a ton of success with international youth programs, being the assistant for Canada at U-17, U-18, World JRs, and Hlinka-Gretzky tournaments.
He was recently interviewed for the HC positions with Calgary and San Jose. It's only a matter of time before someone snatches him up.