CA

Register yourself for CPT exam and prepare well for the same.
All the best.

Dear,
According to me, you should complete your CA first and then think of LLB and there is no specialisation. You can choose within the course but you can choose your work area after completion whether civil, labour law or environment law, etc.
All the best.

After completing class 12th, you can appear for CPT exam. After cracking CPT, you can apply for IPCC. There are two groups of IPCC and after passing one group, you can go for articleship for 3 years. After completing both the groups of IPCC and 3 years of articleship, you can appear for CA final.

Practice is the most important part of your preparation and it should be given 100% focus. Once you have completed your revision, you can take mock test. Mock test helps in preparing you for exam and also highlight your weak areas.

If you want to do CA, you should go with B.Com is much better. But if you want to go along with you BBA, you should have at least 60% marks in your degree to take admission in IPCC.

You need to be focused and work really hard.
All the best.