The path you want to get into is a very dangerous one and it can totally spoil your career without you being able to do anything for it. 

ISI, B.Stat is a very famous course and is known for the entrance paper which is considered very tough by all those appearing in it. The course is tough because the student who is above the cutoff receives a huge financial help from the government covering the major portion of the tuition fee. Apart from this after the entrance exam the candidate can be certain of a well paid job one he/she completes the course and is awarded with the degree.

It gets difficult for the selections if there’s a year gap as lower age students are preferred and in your case there's a two year gap so the chances reduce even more. It would be very risky to change your college again and could cost some harm in your career.

As the scores are low you might not end up being in the college or institute you want to. But, if you do proper research you might at least land in a better place instead of getting admission to the wrong college.

If ever you are skeptical about the eligibility criteria, always check the brochure, it usually contains the eligibility condition which the candidate needs to fulfill.

Moreover, with the latest ISI Brochure, there are no percentage/grade criteria for applying, except if you are applying through GATE score in M.Tech.

It is important to collect a good amount of information as to how to apply to a US college and then ask yourself which course to consider. After this, you must look for that option that fulfills your requirements and needs. When you qualify for those exams, then you must consider which one to choose.

• For the Ivy League colleges, you will be required to appear for GRE Mains and TOEFL. 
• In almost all cases it would be a better prospect for you to give GRE as an exam as it will give a bit more of a specialized vibe to your application. 
• The next step would be to send in your application to individual universities along with your CV, mark sheets, and letter of recommendation from your college faculty.
• In some of the cases, they also require you to send a good SOP. 

Now, you must gather information about all of the above-mentioned exams and start preparing for them.

My brother is doing his PGDBA from IIT KGP and he was rather afraid of programming and coding when he started the course. If you're stuck in the same situation, then my only advice is to enroll in the course with an open mind and a desire to learn to program if you don't already know-how. 

Coding Experience: There is always a first time of everything. Now there are numerous MOOCs available online that can assist you in taking the initial step. The discipline of analytics (technical side) necessitates solid coding abilities, and therefore if you want to pursue a career in analytics, you should start learning the necessary skills now.

Work Experience: It is not necessary to have prior work experience to enroll in the course. However, relevant analytical experience aids in extracting greater value from the course. 

According to your assessment of your interests, you have a preference for fields involving mathematics and statistics. Analytical science is an excellent fit in that regard. I would recommend that you go into MOOCs like Coursera, audacity, and your willingness to learn more about this field. You will obtain a better understanding of the field and would be able to decide if this is a good fit for you or not.

The best course area ISI Kolkata has mastered until today is PCM. It is one of the premier institutes of India and is offering masters in several fields concerning research on Statistics. 

Apart from that, this institute offers 2 UG programs, namely B.Stat and B.Math. The entrance exams to both of these courses are considered to be highly difficult to ace. The entrance exams are relatively even more difficult than JEE-Advanced. 

A major difference between ISI Kolkata and other institutes is that they only enroll around 30-40 students per year, to help keep its value intact. 

Quite clearly, it is a very demanding course area. If only you are typically inclined towards the subject area, you can take it up as a future career, since it is extremely fruitful if aced. 

One of my friends is currently in his first year of M.tech CS at ISI Kolkata. Here are some crucial insights regarding the academics and placements according to his experience.

Academics: 

• If you have a CS background in your under graduation too, then all subjects in the first year will be mostly repetition for you. You can also check the exact list on the ISI website. However, many people with a CS background say that they have learned things in a much-refined way.
• In the second year, you finally get to choose subjects based on your interest which will help you in your final thesis.
• ISI is quite famous for cryptography but you can also find good thesis projects in prestigious fields like Machine learning, Image processing, Algorithms, VLSI, cognitive science, etc. Also, you get good guidance in all of these.

Placements:

ISI is particularly famous for statistics. So, most companies coming for placements offer Data science profiles. Very few companies would be offering developer job roles. So regarding the placements, it’s the best place to grab data scientist roles with lucrative packages. In the recent placement highlights, the average and highest CTC offered was 19.80 LPA and 42 LPA. 

Overall, ISI Kolkata is an amazing place to pursue your M.Tech in CS. The great academics and placement record indeed make it a haven for students associated with CS, mathematics, and statistics fields.

Here's an overview of the internship and Final Placement data for the M.Tech CS 2021 Batch:

Summer Internship

• The percentage of industry domains, where the most internships have been gained are - Data Science: 53.7% interns and Risk Modelling: 11% interns.
• The highest monthly stipend was INR 1.65 lakhs while the average monthly stipend was INR 82,000 lakhs.

Final Placements

• CSE department saw the highest placement percentage of 100%.
• The product-based domain offered the highest number of offers with 20.0%.
• Most of the jobs were for the role of a Data Scientist, nearly half of the total, with a 48% recruitment.
• The highest CTC offered was INR 56 LPA; the average CTC was INR 19.5 LPA and the median CTC offered was INR 18.6 LPA.

The top recruiters for the year 2021 were Google, Alphonso, Morgan Stanley, Microsoft, Amazon, Flipkart, PayPal, Samsung, KPMG, OYO, TATA, Naukri.com, Reliance, and others.