Hello aspirant

You may pursue combination of both CA and CFA courses. But it is necessary to manage both the courses . ICAI alliws only one course along with CA , CFA Institute requires you to be at least in the final year of the bachelor's course hence technically you can pursue both the courses simultaneously in the third year.

Also pursuing CA and CFA at the same time you need lot of money , effort and time. Though lot of things studied in CFA level 2 and3 will be useful in CA final. Decision will be yours but decide wisely don't pursue just seeing others are doing as determination power, stamina varies from person to person.