Accounting & Commerce

In B.Com general and honors, at least 50% is needed.

I will advise you to complete your group 2 and do all your CA final classes alongside practical training.
After your CA, you will have only work to do and earn money.

No, you can't. You need to have a Science background.

The curriculum of BTech is more career oriented, which is divergent to a theory-based course. B.Com on the other hand, is a Bachelor's degree in Commerce. It is similar to B Tech because it is an undergraduate academic degree, except that its focus is more Commerce related.

No, your score is pretty low to get in. I would advice you to apply for different colleges.

Hey Goinod,
Please check the link mentioned below-
https://www.shiksha.com/accounting-commerce/course/bachelor-of-commerce-dr-b-r-ambedkar-open-university-hyderabad-jubilee-hills-84427
You can find everything here.

First, you do your UG in B.Com. Then opt for CA. This requires you to be registered with a CA practitioner and learn while you train. This is a somewhat demanding task and hence very tough. But at the end, last laugh will be yours.
CFA is also a demanding task, but you can have it as a side one. But CFA qualifies you to be a professional in the financial market. CA enables you to be part of all fields and also independent.
Both have their own tracks to tread on.