Hindi

Yes, you can apply for some good colleges like PU, CU, GNDU and others.
Here, I am providing you a link to know some good colleges for B.Sc. Biotechnology in India:
https://www.shiksha.com/science/colleges/b-sc-biotechnology-colleges-india.

There is no such issue. Medium does not depends until and unless you have English as a subject and you have studied English. You can get a seat in Amity University if you are eligible. Any person that fulfils the eligibility criteria can enroll in Amity whether he is Indian or a foreign national.

Hi,
Candidates should have graduate with minimum 50% (45% for SC/ST/Other Backward/PH) from a recognized central/state board/University or other equivalent examination cleared.
B.Tech candidates with 55% marks and specialization in science and maths can also apply.
Candidates are selected based on merit obtained in MGAHV Written Test.
It is full time course. So, you can't apply.
Thanks!

Kindly visit the link:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

No, the questions will be in English.

Hi,
B.Ed in Hindi is a 3-year professional undergraduate course. Eligibility for B.Ed. In Hindi
Successful completion of graduation, preferably in the Arts stream, completed from a recognised university. A minimum aggregate score of 50% (45% for SC/ST candidates) at the level of graduation. The average tuition fee charged for the course in India ranges between INR 8,000 and 1.3 Lacs for a span of 3 years. Thanks!

Visit the below link for all the details:
https://www.shiksha.com/humanities-social-sciences/languages/course/b-a-in-hindi-dakshina-bharat-hindi-prachar-sabha-thyagaraya-nagar-chennai-316181

BA Journalism or Bachelor of Arts in Journalism is a 3-year undergraduate course which is offered by many colleges and universities in India. The basic eligibility for pursuing this course is 10+2 qualification. The student should have qualified senior secondary with a minimum of at least 50% marks. Some institutes even conduct entrance tests for this course.
You can surely do it from the college you mentioned.