Colleges in Delhi

A Diploma, in some cases, is accepted to do a degree but in this case, I do not expect that without the Graduation thing, you can fulfil that criteria to do a B.Ed. ODL from IGNOU. If you have done a Bachelors Degree then you can apply for the admission process.

You can and you should. Most of the people do it simultaneously, thereby saving precious 3 years. The strain might be a bit high in doing both together. Then rewards are high too. CS a professional course and B.Com, graduation, both can be completed simultaneously.