LLB

Law degree will help you to develop the ability to argue from a basis of evidence in a way which can be hard for others to do; this actively cultivates advanced communication skills, keen problem-solving abilities and the capacity for independent thinking. To check the course details, follow this link - https://www.lpu.in/programmes/law/llb-bachelor-of-law.

Yes, you can do LL.B. You can join in the college.

Your educational qualification is pretty good. With good background you can visit Shiksha's official college predictor available on the website to know more about your available options.

Admission process begin you can correct your name with the administrative department. You can talk to the concerned authorities.

Yes you can take admission in GNDU. The eligibility criteria is a bachelor degree of Guru Nanak Dev University or a degree recognized as equivalent with at least 45% marks(40% for SC/ST) in aggregate. Further there is no upper age limit for LLB program.

Hi,
You can do CA by enrolling yourself with ICAI. You have to study hard and clear all the exams.

Hi,
I would recommend after BCA+MCA, as this course is good in demand for future aspects.

You are eligible to do LLB Programme, then after you can go for LLM programme, because LLM programme is a Master's degree programme. And for law colleges you can check this link:
https://www.shiksha.com/top-law-colleges-in-india-rankingpage-56-2-0-0-0