It sounds like you and I are a lot alike. I'm nowhere near the typical image of a teacher. I'm casual and down-to-earth, and, let's face it, a total nutjob
. I'm mature, yet immature. I feel like I've found a good balance, though.
For example, if a kid is getting b*tchy and/or sassy with me (or another kid), my go-to line (which unfortunately has become famous where I work) is "Check your sass. Don't you come in to my class with those claws."
It's almost impossible for me to be super serious when teaching, ESPECIALLY when I'm teaching theatre.
You'll figure it out!
If I did, anyone can.