Hello student definitely you'll clear CA examination no matter if you're a weak student or brilliant student what you need to clear Chartered Accountant examination is determination and patience. After intermediate you need to enroll yourself in foundation course 9 month before the examination.

There are 4 level in CA examination after class 12 as mentioned below -

1)foundation

2)intermediate

3)Articleship

4)Final.

Feel free to comment if you have any doubt

Good luck