Hi Tushar,
I am glad to know that you are looking for SAP Career.
However let me be specific instead of generic.
Its correct that looking at your academics SAP CO would be a good option however I am not clear what kind of experience do you have when you say you have costing experience. Did you work as a costing clerk or cost accounting clerk, costing analyst, Cost Accountant etc. If the answer is yes, then probably I would assume that you have some experinece in handling the related business processes for costing area. However if your experience is more on financial accounting side then we have to take note of the fact that you need to not just have exposure about SAP Controlling but also have proper business process related exposure.
Also you have to take note of the fact whether you have experience in handling manufacturing processes in terms of costing or not.
As there are many industries, many business processes however the standard business processes for example make to stock, make to order, sales order stock, cross company costing are same across industries. It also varies whether the organisation is manufacting or trading or both manufacturing and trading or purely service etc.
In Controlling we have quite a few submodules like Cost Center Accounting, Cost Element Accounting, Internal Order Accounting, Product Costing, Profitability Analysis and if you see in the market there are lot of people who claims to be a FICO Consultant but they dont know anything about Product Costing and CO-PA so there is a real dearth of SAP CO Module consultant especially Product Costing and COPA Area as these are niche skill.
Most of the FICO Consultants in the market are actually SAP-FI Consultant and not CO and real Integration skills.
However it does not matter whichever institute (small or big) you choose to learn, most of then will not necessarily have the best faculty who has proper CO experience to deal with the students and transfer the knowledge.
Also in another way, when you learn on the job its the best method instead of just learning from someone. You can definitely increase your knowledge by doing multiple activities, like attending webinars, reading books, periordicals, practising sap in the system, looking at SDN and other sap forums etc.
So having proper blend of business processes knowledge, sap consultant skills (configuration, all kind of testing including cross module integration skills, deployment) are the key. Also learning SAP FI is mandatory even if you are learning and becoming a SAP CO consultant as then only you can claim to be a proper SAP FICO Consultant.
Also at your level there are more chances you getting into th.e sap consultant jobs as a lateral entry i.e. with domain experinece instead of sap experienced hier.
Having SAP Certification is a good one but this does not give any guarantee to get into the sap consultant job. The key is as I have mentioned proper blend of business processes & sap knowledge
Get back to me in case you need any further clarification.
Thanks & Regards
Subhasish