How can I pursue CA?

Hello Guru, Firstly just don't worry. Even if you have science in your 12th, you can seek admission in B.Com. Once you do this, half the work is done. Once you are settled, there will be enough information available with you that will tell you what to do.

Yes, apply for B.Com. first and this leads you to familiar with course of CA and you get a detailed information. Of basics commerce in B.Com, as you are from science stream.