B.Com

I hope you are doing well. For MBA admissions, you will have to appear for competitive exams like CAT, MAT, CMAT, CET, etc. and they constitute English as its inherent part. If you believe you can work hard on your English then definitely go for MBA. Other than that SSC exam would be easier for you to crack if you have good quantitative skill and it would give opportunities to you as well.

Yes, you can definitely for PGDM course as the requirement of scores for the various colleges is distributed along as 50% + grades in 10th, 12th and graduation and a good MAT score. So, I would suggest you to prepare well for the MAT exam and definitely look forward for your preferred opportunities.

After completion of 12th standard in commerce, you can apply for government sector jobs like group D exam.
The eligibility criteria for Group D post:-
1) Those candidates who have completed 10th standard from recognized board are eligible for Railway Group D post.
2) Your minimum age should be 18 years.
Yes, you can do graduation degree simultaneously but your degree must be part time course. Still you can apply in B.Com or BBA.

Hi,
You may refer the link below for the list of b.com colleges in Ahmedabad:
https://www.shiksha.com/accounting-commerce/colleges/b-com-colleges-ahmedabad