Hello

Yes, of course. We can study CA right after 12th, after clearing CPT Exam. But keep in mind CA is a correspondence course. You will regret later in life if you don't go to a decent College. But there is a catch also.

You can have the best of both the world. Register for CA-CPT . Clear CPT. Side by side join college for B.Com. Enjoy college for straight 3 years. During these 3 years, complete 50% of CA (IPCC). After completing graduation, join 3 years CA articleship. Complete CA. Enjoy Life.

I hope it will help you
Good luck...