You can pursue M.com, MBA, CA and many international courses also. As you have already completed b.com if you pursue CA you don't need to give CPT but can directly continue from IPCC to CA finals. MBA comes as a major choice of students for P.G. after b.com. You can pursue MBA in following fields:-

• MBA in Finance 
• MBA in Marketing
• MBA in Human Recourse Management
• MBA in International Business 
• MBA in Operation Management
• MBA in Information Technology 
• MBA in Supply Chain Management
• MBA in Rural Management, and many more. 

You can also pursue international courses like CMA, CPA and ACCA if you wish to go and work abroad in future. Best of luck, hope my answer would help you