CA

When I read the question, the instant answer that came to my mind is CA. No doubt that CA is far more advanced and acceptable in any industry. CWA and CS have comparatively fewer opportunities.
If you are doing CA then you should complete it within 4 years. Not more than that to achieve everything on time otherwise your life will be tough if you started getting flunked.
Start working with studies instantly. Work is a very important part of CA, without working, you can't get the true meaning of CA.
I will not write much about CWA and CS because the scope of both the courses is very limited as compared to CA. CWA takes around 3-years but the syllabus has been changed now and also it has a very low passing percentage. So it will not be easy to clear CWA either but its return in terms of package can't surpass CA. You can get a job in foreign countries with CA. This benefit is not available with courses like CWA and CS.

Yes, your marks and your attempt get counted everywhere you apply. If you are looking for a job in an MNC then you must have scored good marks and have less number of attempts. If you take many attempts then only it's on company's hand. They can give you the job if only they find some real quality compared to others.
Also, if you can explain why you needed those extra attempts, you still have a chance to shine in the Interview and get that coveted articleship.
Generally, this is used as a distinguished between the quality of a student who has the same scores or experiences. Although this may not be an ideal way, the fact that one student could clear the same exam in the first go deserves some amount of preference.
This consideration is only done in the 1st or 2nd job but as you move up the ladder for the work experience, there will be many other skills that you will acquire which will boost your overall profile.

Here are some of the best coaching for CA:
1. Advance Education Center - Offering tutoring facilities to school, college, post graduate students and coaching for professional courses like CA, CS, CFA and ICWA.
2. Account Age Infotech Pvt. Ltd. - Offers job oriented courses in the field of financial accounting, banking, taxation, VAT, excise and TDS. This coaching institute has good faculty member which helps student to cover the syllabus of CA
3. Vidya Tutorials - Engaged in providing coaching courses for the preparation of CA and computer courses with best faculty member and average good result
4. Marigold Classes - Providing class room and postal coaching courses for the students of chartered accountancy and commerce courses.
5. Sri Sankara Coaching Centre - Offering professional courses like the chartered accountancy, cost accountancy and company secretary. Having a best result in the last few years.

Nothing is tough, CA or CMA almost same in study and it depends upon the capability of the student. Basically CMA gives more emphasis to cost and operations while CA gives equal importance to law, cost, tax, accounts, etc.
So if somebody likes more practical then go with CMA and otherwise go with CA. CMA is more practical then CA.
Foundation- CA has less syllabus with more details but in CMA have more syllabus but details are less.
Intermediate Level- CA have some tough subjects in inter level, but so as CMA consists 8 subjects with one more subject in comparison of CA have 7 subjects. CMA wide syllabus again here in comparison of CA but CA have more detailed syllabus again.
Final Level- In final level we face same number of subjects in both CA and CMA. Here we face same level of toughness in syllabus. In CMA we have choice of choosing one subject as specialization while in CA we have no such choice. So in last final level we can say CA is tough from CMA.
But in job security CA offer more job security from CMA.
And in training period CA have very tough training and whenever you complete you training after that you appearing in final level. In CA you have to complete training of three years after completing CA inter (IPCE). CMA has more flexibility.
So at last I want to say if you want to do CA or CMA then you should ready for hard work and dedicated to your course and syllabus are almost same as 80 to 90%.

Although, a some parts of the syllabus of the accounting courses is similar, the fact that the ACCA qualification offers more prospects both in India and abroad is still an advantage.
ACCA (Association of Chartered Certified Accountants), UK, is a global body of professional accountants and is recognized as the world's largest and influential accountants association expanding over 170 countries and training more than 370,000 students all over the world. Unlike CA or other accounting courses, ACCA qualification is in line with the current demands of employers all over the world.
Although ACCA is considered similar to CA qualification in India, ACCA provides additional knowledge of UK GAAP, Laws & IFRS, which directly puts you at advantage if you work for a MNC or an Indian firm that works for clients abroad. If you are doing an MBA with your ACCA, you stand a chance to attract more job opportunities to select from.
One more thing that sets ACCA qualification apart from CA is that you can acquire a degree at the same time as studying towards achieving the qualification. Obtaining this degree will surely put you in demand with employers throughout the world while increasing your career prospects.
ACCA qualification is recognized in countries like Australia, Canada, UK and many more. Their government considers this qualification as an eligible qualification for students to apply for jobs. ACCA students also get an option of studying from home online courses through accredited tuition providers.