Business Management Studies

You can check out the following - https://www.shiksha.com/bba/du-jat-exam.

It is not necessary to enroll for the CAT exam.

You can check out the following for more information - https://www.shiksha.com/mba/atma-exam.

You can check out the following - https://www.shiksha.com/business-management-studies/colleges/executive-mba-colleges-india.

You have got many online platforms for video marketing course you can surf through the requirements and make a registration accordingly. Some of the top providers are
Udemy
Coursera
Simplilearn
Hubspot
Digiperfrom
Excel.

Since you have a good total of TANCET marks,Surely you can try for mepco and the last date will be till the month of July. since the college management haven't mentioned about the last date but admission registration is still going on.

Tier college mainly includes all Iims for management and all NIT's and IIT's. Some private colleges are also there
Vit University
Manipal academy of higher education
Amity groups
Amritha vishwa vidyapeeth am
And many more reputed institutions
it also includes the college that comes under institute of eminence.

Top Hospital Administration Colleges in India
DYPUSM Mumbai - School of Management Dr DY Patil University.
IGNOU Delhi - Indira Gandhi National Open University.
Jamia Hamdard, New Delhi.
IMS DAVV Indore - Institute of Management Studies Devi Ahilya University.
GITAM Institute of Management, Visakhapatnam.

Certainly yes, it is easy to take Provisional admission before giving your senior secondary, however, you must have to appear in your class 12th and on the outcome of your exam LPU will offer you provisional admission. After getting provisional admission don't forget to fulfil the eligibility criteria. Once you fulfil the eligibility criteria then you can take easily the Integrated programme (BBA-MBA)The curriculum provides real-life, practical experience making students skilled and work-ready in their selected specialisation. Hope this helpful.