Surat

Check your chances here at Shiksha's JEE Mains college Predictor. Link for it is given below:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6540165.

CS is the good option among all, but choose by your interest.

Yes, as you have completed Bachelor's degree, you can opt for the course.

With 48% marks, it would be difficult to get in a good college. You need to have 50% and above for admission.
College in Surat for B.Ed are: B.J. Patel College of Education, Government B.Ed college, Sarvodya College and many more.

SCET, SVNIT, C.K Pithawala, Faculty of Engineering and Technology Research (FETR), Government Engineering College Surat, Pacific Engineering College.

Please use the link provided below for an exhaustive list of colleges which offer B.Ed courses from Gujarat. You should be able to navigate to a college of your choice using the filters on the web page. Download their brochure for details regarding the institute, course eligibility, admissions etc.
https://www.shiksha.com/teaching-education/colleges/b-ed-colleges-gujarat