Hello

I extremely sorry to tell you dear but after you 12th commerce you cannot go for computer science engineering or any engineering

This is because,  to be eligible for engineering you must have passed done your 10+2 from science stream with physics chemistry and mathematics.

For example,

As per JEE mains ( an entrance examination for engineering) eligible criteria to be eligible  for JEE mains for BE or Btech you just must pass 12th board exam with Physics,  mathematical  and anyone of Chemistry or Biology or Biotechnology or Technical Vocational Subject.

Thank you