Many people do BCom (//B.Com) and CA simultaneously as BCom (//B.Com) acts as a safety net due to the high unpredictability of the examination held by the Institute of Chartered Accountants of India. It would be better to go with these courses simultaneously as you may not predict the outcome of the CA examinations effectively and might need an exit route, and BCom will provide you with this excess route precisely.

Hope I have answered your question. All the best!