I am extremely sorry to tell you dear but you can't do engineering after your 12th BiPC, that is 12th with Biology Physics and Chemistry

This is because ,

You are a bipc student and you have not studied mathematics in your class 10+2 , but to be eligible for engineering it is mandatory to study mathematics in your 10 + 2.

For example,

JEE mains is is the most popular and reputed entrance examination for getting into engineering and its el igibility criteria says that to be eligible  for JEE mains 2021 for BE or Btech you just must be either appearing for 12th board exam in 2021 or should have passed it in 2020 or 2019 with Physics ,  mathematics and anyone of Chemistry or Biology or Biotechnology or Technical Vocational Subject.

so, to be eligible for doing engineering you must have done 10 + 2 with maths but as you have not studied math in your 10 + 2 you are not eligible for doing engineering

Thankyou