Hi Khushi, since you are interested in COER so let me tell you that I order to take admission in COER the basic eligibility criteria need to be fulfilled:

• 50% in 10+2
• Have once appeard in JEE Mains( doesn't matter whatever the rank is but good rank can let you to have some concession in college fees).

That's it. Thus you can easily get admission in COER.

Thank You.