Go for it. Of all the teachers I had, the two best were history teachers. I don't mean soft touches who had an easy class, I mean teachers who were engaging and made history matter.

By coincidence, two men named "Ernie". Souvapolis and Grekis. American and world history, respectively.

The lousiest teacher I had was a high school mathematics "teacher". Had to figure math out as an adult. Not that difficult when someone explains it properly! Well, to a point, anyway. I'm no physicist.