As you have not mentioned your current qualification so you can consider below points as these will be helpful for you -

To become a primary teacher, you should be preferrably graduate with NTT/ B.Ed. To become high school level teacher, you should be at least graduate with a B.Ed degree and you should have cleared CTET or STET to be able to teach till grade 8.9 and above grade don't require you to clear these papers but B.Ed and graduation.

To become secondary level teacher you should be post graduate with B.Ed.

Hope this helps!!!