CBSE 12th

Dear Prerna,
You have selected a subject stream after class 10th to study ahead. Now, since you have already studied that stream which you have not mentioned here, it is advisable to follow the graduation or any other course with the same field. I believe, you might have selected that field, because of your area of interest.

You can do BM-Bachelor in Mass Media. It is a great field for stuffs related to editing and video making.

You have several career options my dear. After 10+2, you can go for B.Sc Agriculture, because this is the only field where you won't get any low class job. Apart from this, you can have any Bachelor's degree and start preparing for any State Public Service Commission exams, which will bring you to the next level of life and upgrade your knowledge.

Yes, there are certain colleges which offer admission to the students who have not given any entrance exam. Among several colleges, I would suggest a few colleges:
1. Rajiv Gandhi College of Engineering and Technology, Chandrapur.
2. Ballarpur Institute of Technology, Ballarpur. Dist. Chandrapur.
3. Gaikwad Patil College of Engineering, Nagpur
4. Vidarbha Institute of Technology, Nagpur.

So, you have two options either continue it and merge yourself towards field like MBA, B.Sc, etc., or take a drop of one year and do it with science stream and do what you are interested in.

Dear Rashi,
It's possible to do CFA right after class 12th. There are 3 levels in CFA.
For Level 1: You need to be an undergraduate student. You can give this exam in your penultimate/ultimate semester. For this, you need to deposit the one time membership fee and then exam fee.For Level 2-3: You need to be a graduate and clear your level 1 and 2 respectively.

It is difficult to get a seat with that percentage for CSE. I would suggest you to search for another branch.

Yes, you can apply if you have interest and if you want to grow in the sector of environmental science.

Your profile seems quite decent to me. With a really good CAT score you should be able to get a call and from there it would depend on the interview. By the way, you didn't mention your graduation college, because that would also make a difference. Do also look at XLRI and FMS, I feel you would find the experience better for your background.

Go for direct engineering like BE/B.Tech. Don't go for Diploma. Diploma is chooses basically when you have no chance to get admission in B.Tech programme or those who are going to waste their year.
Diploma is better to pursue when one chooses it after10th, not 12th. Go for B.Tech or BE.