B.Com

The best government college for 3-year LLB are:
Banaras Hindu University (Varanasi)
Allahabad University (Allahabad)
Lucknow University (Lucknow)
Lndraprastha Law College
These are best law college.

Class 12th pass student are eligible for B.Com. There may be some entrance exam college to college.

Go for all the government colleges and universities preferably those who want math as your optional subject. Mostly government universities look at the percentages and optional subjects for admission. You just need to focus on your class 12th examination. Gain good marks so that you will able to apply anywhere.

Hi,
You can do it, but your percentage may be a trouble for getting admission into reputed colleges. And still you are eligible for admission. All the best.

Hi, you could directly register for intermediate course of CA on your graduation.

Kindly contact the college for specific information.
Website: http://www.jaincollege.net

The article in the link below will help you get a better idea about the course options available after B.Com.
https://www.shiksha.com/accounting-commerce/articles/course-options-after-b-com-blogId-12939.

You have to opt D.El. Ed to become a teacher at primary level. It will easy your work. Now, B.Ed is also applicable for primary teacher. Choose, on your mind set.

Kindly contact the college officials for the same, as they will be able to assist you with the college timings.