D.Ed

Hi Vijaya Lakshmi, Yes. There are many colleges that provide D.Ed with your required eligibility. You can check the eligibilities for the course in different colleges here. https://www.shiksha.com/teaching-education/colleges/d-ed-colleges-india
Thank you.

Yes you can do D.Ed your Diploma must be equal to +2 intermediate and must have atleast 50-60 %. .

Yes, it is possible to get admission in B.Ed without D.Ed as the education qualification needed for B.Ed is to pass degree in any subject with at least percentage mentioned as per the Institute or college you want to pursue from. So D.Ed is not required to do B.Ed. And most probably you would definitely have a degree as you are a lecturer, so it is very easy for you to do B.Ed. There are certain institutes in every district for the teachers and lecturers to do D.Ed B.Ed. M.Ed as per their convenience.

You need to clear graduation with at least 50% for B.Ed.

D.Ed: Eligibility
Successful qualification of class XII from a recognised educational Board. Preferably, humanities subjects as the main subjects of study at the 10+2 level, and a minimum aggregate score of 50% (45% for SC/ST/OBC candidates). May 27, 2019.
Eligibility: 10+2 with minimum 50% marks in aggregate with Science subjects.
Course Level: Diploma
Admission Process: Based on the performance in the entrance exam.