Practice makes perfect..
My sincere advice to all the 12th students is Choose the course which you are interested not your parents or anyone else. This is very very important because it is going to assess your future. Think well and take a good decision.
If you like the course then as you enter in that particular course you will start loving the course and that only will make you excel in life.
After my 12th I did my UG in Biochemistry and later finished my M.Sc. and M.Phil. I love my course very much and still now I remember my subject because I didn't learn for the sake of getting marks but I learnt the subject with great interest.
Please students you should decide about your course.