You probably can. I had a (public) high school teacher who was a Latin BA, and when he was hired at our school he taught English, then started a Latin club wher

You probably can. I had a (public) high school teacher who was a Latin BA, and when he was hired at our school he taught English, then started a Latin club where he taught it to maybe 10 students the first year, several more the next. He also worked a lot of Latin into his English curriculum. Now, if you want to be paid to teach only Latin, that's a harder sell.