Company Secretaryship

After +2, a student is eligible to take the Foundation Course. Examination can be taken twice a year, in June and December.
Candidates who pass the foundation examination are eligible to seek registration as students to the Company Secretaryship course.
The course completes after a preliminary, intermediate and final examination.
Final Examination can be taken after 18 months of enrolling in the course and having undergone satisfactory postal or oral tuition for the particular group of final examination. Enrollment is open throughout the year. For appearing in the June examination, enrollment is on up to -September and for appearing in December examination, enrollment is completed by March.
Practical experience ranging from two to three years or Management Training for 15 months and four months practical training in a company which is arranged by the Institute is also required. After qualifying in the Final examination and undergoing practical training, a candidate is eligible to be admitted as an Associate Member. Senior Associate members may be entitled to become Fellows.
Admission is open to anyone who has passed the graduate examination of a university in India or any other equivalent qualification or those who have taken the foundation examination.
How to get there-
https://www.shiksha.com/getArticleDetail/2010/Career-As-A-Company-Secretary

Of course, you may pursue these courses together and in-fact, if you belong to the commerce background, the Bachelor's degree program must be pursued along with the company secretary course because it will save the time and preparation for one will help the other and especially the CS course will help a lot in your B.Com programme.
Now, the question arises that are these courses interrelated?
If not to a very large extent, they are of course interrelated to certain at a level. A professional course like CA, CWA and CS, has a professional approach and it helps the student to have a higher level of knowledge in the respective field compared to the regular B.Com course and it ultimately helps the students of a degree program in the related field.
Here, I am providing you with the syllabus of the company secretary program, which might helpful for you to understand better.
Foundation Programme:
English and Business Communication
Economics and Statistics
Financial Accounting
Elements of Business Laws and Management
Executive Programme:
General and Commercial Laws
Company Accounts, Cost and Management Accounting
Tax Laws
Company Law
Economic and Labour Laws
Securities Laws and Compliances
Professional Programme:
Company Secretarial Practice
Drafting, Appearances and Pleadings
Financial, Treasury and Forex Management
Corporate Restructuring & Insolvency
Strategic Management, Alliances and International Trade
Advanced Tax Laws and Practice
Due Diligence and Corporate Compliance Management
Governance, Business Ethics and Sustainability

Hello,
Thanks for asking.
CA will provide you job opportunities in Accounting, Auditing, Taxation, Consulting Firms, Management Accounting etc. Where CS will provide you job opportunities as Legal expert, Corporate Planner, Strategic Manager, Chief Manager, Executive Secretary etc.
Qualifying CA Exam will give you respect in society. After Qualifying CS you will be trated as an expert in Company Laws & practice.
Well C.A (charted accountant) is better than C.S. Because opportunities and salary wise C.A will be better.
For more details you can Read:
https://www.shiksha.com/confused-between-ca-versus-cs-article-4952-1
I hope it will help you.
Best of Luck :)

After 12th, a student is eligible to take the foundation course. The examination can be taken twice a year, in June and December. Candidates who pass the foundation examination are eligible to seek registration.
It has 3 levels preliminary, intermediate and final level.
The final examination can be taken after 18 months of enrolling in the course and having undergone satisfactory postal or oral tuition for the particular group of the final examination. Enrolment is open throughout the year. For appearing in the June examination, enrolment is open up to September and for appearing in December examination, enrolment is completed by March.
Practical experience ranging from two to three years or management training of 15 months, and four months practical training in a company which is arranged by the institute is also required.
After qualifying in the final examination and undergoing the practical training, a candidate is eligible to be admitted as an Associate Member. Senior Associate members may be entitled to become fellows.
Admission is open to anyone who has passed the graduate from a UGC approved university or any other equivalent qualification or those who have taken the foundation examination.