B.Com in Delhi

I ,am providing you the name of colleges you can check it :
DPG DEGREE COLLEGE - [DPGDC], GURGAON
IP university
DELHI COLLEGE OF ARTS AND COMMERCE - [DCAC], NEW DELHI
JESUS AND MARY COLLEGE - [JMC], NEW DELHI
KASTURI RAM COLLEGE OF HIGHER EDUCATION
JAMIA MILLIA ISLAMIA UNIVERSITY-[JMI], NEW DELHI
MAHARAJA AGRASEN COLLEGE - [MAC], NEW DELHI
ACHARYA NARENDRA DEV COLLEGE - [ANDC], NEW DELHI
ANSAL UNIVERSITY- [AU], GURGAON
FAIRFIELD INSTITUTE OF MANAGEMENT AND TECHNOLOGY - [FIMT], NEW DELHI
SGT University
For more you can refer to this link :
https://www.shiksha.com/accounting-commerce/colleges/b-com-colleges-delhi-ncr

No, your class 12 percentage is low. But, if you have any sports quota with Reservation. Then you should wait for the 4-5 cut off.

Yes, you are eligible. But, you should wait for the 3 and 4 cut off.

With this percentage, it is almost impossible to get admission in a government college in Delhi.

Following Delhi University colleges can be suggested as per your query:
1. SRCC
2. Hindu college
3. Ramjas college.

You should surely apply for Lady Shri Ram College of Commerce.

For learning in internship - contact practicing CA firm or legal firm or private consulting firms independently.

On April 15, 2019 you firstly have to fill the registration form and go for entrance test, after which that you can get admission in DU if you fall in the merit list.

Mumbai is a commercial capital of India and has a better scope for the finance field. Hence pursuing the course in Mumbai will be beneficial.