When should I start giving music lessons?

Right now, I am a 16 year old freshman in high school. I'm the top saxophone and clarinet of a 6A school, and I take private lessons. I wanted to start giving lessons because it sounds like a fun job, and I would earn more than minimum wage. (assuming that I would charge $5.00 for a 30 minute lesson) I thought junior year would be a good time to start giving lessons, but I wanted advice from people who would have more knowledge in this area. Also, would you have any helpful suggestions about giving lessons? Thank you.