Ok I'm with chaoticGRRL on this, with a nod to hint #3 - You're thinking of applying for a teaching job up north, but aren't sure if you should.
Now that I look at all of the hints, I can totally see how you'd get that. Good guessing - definitely. But not quite there.
Rainbow looking like Northern Lights, Iditarod, Questions, Answers, Classroom. You're thinking of racing in the Iditarod and then teaching your students about your experiences.