I advise you to go for CWA which is easy when compared to Company Secretary (CS) and arguably, CS is the most difficult comparatively with Costs & Works Accountant (CWA) and Chartered Accountant (CA). For CS, there is a 15 month mandatory Articleship which has to be completed in order to get the eligibility for the Final exams and for CWA, no articleship exists. FYI...for CA, the articleship is 3 years.
Articleship means either
1) you need to work under a practising CS as an Articled clerk
or
2) Work under a CS in any listed company.
Approx time for completion:
CWA - atleast 1 year for passing Inter and another 1 year for final = 2 years
CS - atleast 1 year for Inter and 15 months on articleship and another 1 year for final (if cleared all the exams in the 1st attempt which will be unlikely) = 3.3 years
CA - atleast 1 year for Inter and then 3 years on articleship and another 1 year for final (if cleared all the exams in the 1st attempt which will be unlikely)= 5 years
Also, the pass percentage for both CS and CA in the country is 2% where as for CWA it is slightly higher.
A CA or CS can easily get a job with atleast completion of Inter (half the course) where as a CWA don't have that provision.
Also, career wise, a CS or a CA can either
1) Go for his own practice after getting the Certificate of Practice
or
2) Work in any company (as per the Indian Companies Act, every Listed company in India should have a full time COMPANY SECRETARY in their payrolls)
Where as a CWA is always suppose to work only in the Manufacturing Sector.
A CS holds the highest position in any company and is the master of Companies Act, Business Laws, Income Tax Act, Sales Tax and VAT, Corporate Governance etc and is the only person who liaises with the SEBI and the Registrar of Companies where as a CA takes care of only the Accounting procedures. Also a CS with a Law Degree will add more value.
Obviously if a CS or CA chooses a govt job (though not many are preferring these days as Private sector is offering lucrative pay), he will definitely be in a higher grade but not certainly in the ranks of an IAS and honestly these 2 cannot be compared.
Note : The above said professional courses are recommended to be taken up by only those who are good at their academics right throughout . If given up in the middle, it leads to lot of time wastage.
You can always reach me for more questions or guidance.