As you have completed class 12 with commerce. Whether you have taken maths ? If maths is one of your subject straight way proceed and focus on Chartered Accountancy. Rather than doing B.Com you focus on professional courses. The scope is unlimited and sky is limit. Company Secretary is also other course. Cost Accountant and many more.

CA Intermediate you can start after class 12

Hi, 

It is better to do B.Com as both CA and B.com deals with numbers. You can also pursue your bachelor degree in correspondence. 

Hope it helps!