D.El.Ed (also called JBT in some states) trains teachers for the elementary stage and starts after Class 12. B.Ed trains teachers for secondary and senior secondary classes and starts after graduation.
Pick based on the classes you want to teach and the teacher eligibility tests in your state. Always confirm that the institution is recognised before you take admission.
This guide is general information. Dates, eligibility and fees change every session, so confirm them with the institution or the official portal.