Hello dear student!

In order to become primary school teacher after 12th, either you can directly pursue NPTT ( Nursery primary teacher training program) or JBT (Junior basic training diploma) . You can also do B. Ed.  After doing bachelors in any field . These are all professional courses after which you can go for primary teaching. For government schools, you can appear in the various government teaching basis exams such as TET.

Hope this will help you !

All the best!