What should I do after completing B.Com (Hons.) except for MBA?

If you do not want management then you have too many options like CS, CA, CMA, LLB, M.COM, MCA, MCS, etc. You can go for short term Diploma in accounting and finance. Other than this, start preparing for comparative exams.

You can go for CA. As you are already a graduate so you don't have to give any entrance exam that is CPT. Now, you have to give inter that is IPCC exam or you can also go for CMA, CPA, ACCA or M.Com. Best of luck.

You can go with CS, CA, CPT and many other exam after B.Com. You can also go with government exams like SSC CGL, SSC CHSL, Bank Po, Bank clerk, etc. Get the details from here: https://www.eduncle.com/ssc-chsl-recruitment-exam-for-ldc-deo

You must go for CPT exam and prepare for CA to pursue your career as an accountant with handsome salary and promotion.