Dear student,

I hope you are doing well.

You could drop out your cse course and go for BSc in forensic if you have passed out in your 12th class in biology. 11th and 12th Biology is 1 of the most important subjects for forensic. You will have to take admission from first year itself if you want to get into forensic.

But if its just your intent to gain knowledge you can read some reference books also just to gain knowledge.

Note: cse has no link to forensic so u will need to start from scratches.

hope this helps!!