USA

You must have studied Business Mathematics (aka Quantitative Methods) and Statistics in B.Com. Why don't you enroll in a course in Microsoft Power BI (Business Intelligence) in India to prepare yourself for a career in Data Analysis. Once you get a good knowledge in BI, apply for a MS in Business Analytics in USA. From the information I could gather, the following US universities accept applicants with a three year Indian Bachelor's degree.
University at Buffalo (SUNY)
Binghamton University (SUNY)
Columbia University in the City of New York
Northwestern University
University of North Carolina at Charlotte
Carnegie Mellon University
Tuck School of Business at Dartmouth
Wharton School, University of Pennsylvania
Zicklin school of Business, Baruch College (CUNY)
Darden School of Business, University of Virginia
Whitman school of Management, Syracuse University
Kent State University
Stony Brook University (SUNY)
Hunter College, City University of New York
Fordham University
Please visit the universities website to check whether or not they offer MS Business Analytics. Job prospects are great for a career in data analysis.

There are many ways through which you can study B.Tech in Computer Science in USA like getting sports scholarship from the university, by giving TOEFL exam, by giving SAT exam or by directly approaching to the university that you want to take admission in.
There are steps you can take to know about how to study B.Tech in Computer Science in USA and they are as follows:
1. Research your option- You can talk to educational advisor or consultant, you also should be sure about the college that you want to get in and should prepare for the requirements that college need like marks or extracurricular activities.
2. Finance your studies- As you all know, studying in a foreign country like USA is very expensive and would cost very much to anyone.
There are many things that you can consider to get scholarships or assistantships in the college that you want to go.
Scholarships can be achieved by giving exams like SAT or TOEFL or getting any sports scholarship.
SAT or TOEFL exam ensures your admission into any foreign College.
According to your marks, college considers your position or rank in SAT or TOEFL exam.
3. Complete your application- You need to submit the application to the foreign Colleges showing your SAT results and you should send the application to at least 10 Colleges.
If any colleges accept your application, they will call you for an interview.
And if you clear the interview, then you need to pay the admission fee.
It would cost around INR 12 lakh rupees to study in USA for a year, and if you want to study B.Tech in USA, it would cost around 30 to 50 lakh depending upon the college that you are choosing.
The above amount mentioned is without the scholarship and it also includes your admission fees, your travelling fees from India to USA or USA to India about 4 times. And, it also includes your living expenses and travelling expenses.
If you get a scholarship, then it would cost around INR 10 lakh rupees in 4 years.