B.Com

For admission in DU, you need at least 90% marks in boards.
The closest college from CP is Zakir Hussain College, DU. You can get admission at 60% marks if you belong to SC or ST category.

MBA will be good.
It is a professional degree about business administration.

Yes, it's a good but challenging course.
But nothing is impossible.
But CA or CMA is preferable.
However, go if you are interested and hardwoking.
All the best.

You can go for professional courses like CA, ICWA, CS, CMA. These courses give great careers. But you need to be more hard-working and have lot of patience to study them. They are challenging courses.
Or, do an MBA in a reputed college and get placed. This is also a very good option and most preferred option because you will settle in 2 years.
You can also do M.com or apply and prepare for bank jobs.
Ultimately, what matters is your interest to do a particular course.
All the best.

B.Com has a good scope and you can get a job of an accountant after completing UG. You should pursue CS along with B.Com to get better job prospects.

No, there will be pre-decided subjects in B.Com.

If you complete your graduation with B.Com Hons with good marks. So, it will help you to do MBA as soon as possible and if you have a talent. So, go forward and do it.