Diploma

I don't think there is any sort of fee concession, especially if you do not fall in non-creamy layer.

Go to the website of CCS University and fill up the form. The form will reach the dean. There will be entrance test also. Study Hard. The forms start from August 5th, 2018 and will end on August 22nd, 2018.

Yes, after the successful completion of Diploma, you are allowed to take admissions in IIFA Multimedia for PG course in Interior design, as the eligibility criteria for the course is to have minimum qualification of 10+2 examination passed from a recognized board.

Yes, offline admission is available here by applying directly to the college.

Yes, you can take admissions in IIFA Multimedia for Diploma in animation or engineering and the minimum qualification should be 10th pass by any of the recognized board. The age criteria is minimum 16 years.

Unless you clear your back you can't get admission.

You can consider following colleges:
Amity
Galgotias
Jaypee
NIT, Noida