Pre Primary & Primary School

It is a very good idea. Firstly, you have to do the primary teacher's training certificate as PTT, BTC, D. El. Ed., and B. El. Ed etc. After that, you have to clear TET exam either CTET or state TET. And you must be selected in merit list.

You can't pursue post graduate Diploma course through distance mode of education.

After gaining so much experience, I think you can teach. But, as per the new government eligibility for teacher is that a teacher must have a degree of B.Ed. So, it depends on school to school that they take you as a teacher or not. But, you can teach primary classes. I suggest that you should pursue B.Ed, because it is must for teacher.

Yes, Diploma in Nursery Teacher Training is offered online which is of 1 year duration.

Hello Ishani,
To answer your query I am attaching a link below which hopefully will clear your doubt-
https://www.shiksha.com/teaching-education/course/early-childhood-education-n-p-t-t-polytechnic-for-women-south-ex-1-delhi-16569?q=Polytechnic+for+Women&rf=searchwidget&landing=clp
Hope this was useful for you. All the best and thank you.

Please refer to the link mentioned to know about the details: http://www.tnou.ac.in/sch-soe-syllabus/.