Python

If you are saying machine language, then you should have been specific. If its machine learning then it's the best job in today's world. Today python programmers are in high demand. Machine learning has taken almost everything. Sorry if its machine language. Let me know if it's not a typo.

Some of the good institution are:
Aptron
Cryptus
Aptech etc. Good luck.

Yes, of course, if you pursue B.Tech (CS)/BCA then you will be taught python as a compulsory subject in your academics.

It totally depends on your interests. Most popular and widely used languages are C and Python and they are getting their momentum back in the market. SQL is an easy language which can be learned easily and PHP is for server-side scripting for web development.

Only learning python is not sufficient but you can take admission in a college or join some courses where you will gain complete knowledge about it. For more details, go through this link:
https://www.shiksha.com/it-software/cyber-security-chp

There are many institutes that gives training on Python and AI, but these are separate courses. So, you need to do them individually.

You have a good score in GRE and IELTS keeping that in mind you can do MS from foreign in Data Analytics as you are good in Python and R. You can easily get a scholarship in foreign.

Go for MCA degree but before it learn basic programming languages like C, C+, Java and understand all the basics clearly in your mind. Participate in competitive programming in Hackerearth, hackerrank, codechef, etc.

Hi, you may, depending on how selective the universities are, how strong the other applicants are etc. You must show some relevant skills, good skills in quants, projects, workshops etc. LOR and SOP is also required.

No, college teaches python under the B.Tech CS/IT curriculum, you can pursue a course in python on our own.