University of Madras

Yes. Mass Comm is a very good field with very good package. Since you are already interested and determined about it, you may actually enjoy it. Also, I would suggest checking courses available in Jamia Milia Islamia.

Microbiology is the field which has different specializations including applied microbiology. Some of the branches in M.Sc which you may encounter in this field are mentioned below:
Master of Science in Applied Microbiology
Master of Science in Medical Microbiology
Master of Science in Microbial Genetics and Bioinformatics
Specializations in Microbiology:
Agricultural Microbiology
Industrial Microbiology
Evolutionary Microbiology
Nano Microbiology
Cellular Microbiology
Soil Microbiology
Veterinary Microbiology
Generation Microbiology
Microbial
Water Microbiology
Pharmaceutical Microbiology
Microbial Genetics
Environmental Microbiology

Hi Shanu,
Yes, there is Tamil journalism as a part of the syllabus. You can refer to this link to see the entire syllabus of the course:
http://www.unom.ac.in/uploads/department/syllabus/41_ma-journalism.pdf

Admissions are going on, you can go to the Institute of Distance Education (IDE) single admission window centre, get the form and apply for admission.

Yes, you can definitely go for it. Also, try for internships for better experience.