Languages

Yes, you are eligible as you should have atleast 50% marks in 12th.

There will be many foreign universities offering distance education like Nottingham Trent University Online, Walden University, Mass Online, etc. You can simply find it on the net, check the university websites for the requirements and apply. Check for necessary accreditation also. The application process will be online.

It's very nice to see your enthusiasm for English literature. Its the best you are doing. There are plenty of opportunities for professionals in English language. I am attaching a link that will give you all the required information about your query. https://www.uohyd.ac.in/.

Go through Hudson's Background to the study of Literature threadbare. The book will give you a comprehensive idea. Study Abram's Literary Terms beforehand. Read some Shakespeare and Keats. Improve your literary taste. Learn to read in detail. Get rid of superficial reading.

If the university has the option of studying, then by all means, you can study there.

I hope that you have good chances for interaction. Begin with increasing your exposure to English. Writing frequently and cultivate thinking in English, first. Read loudly to make yourself familiar with aspects of pronunciation. Listen to good English, being spoken. It is all a matter of practice and time.

Yes, you can pursue the same from here. They provide this course. Good luck.

Yes, there will be some aptitude and reasoning questions there. So prepare well.
Good luck!

Yes, you can apply for the same. You are eligible.
Good luck!