B.A Scope

Hello
Pleasure to meet you. Yes you can definitely go abroad for your Masters degree.
One of the main advantages of choosing to do a Master's abroad is aiming for a highly ranked world university. This means access to better academic education, from reputed professors.
However, if pursuing higher studies in India is what you prefer, choose the best course available. The advantages of being on home ground are several.
Good luck.

Yes, since the both degrees are on the same stream (Arts) you can opt for M.A. In Disaster and Emergency Management after youth B.A. In History.

To be considered eligible for MJMC, candidates must hold a Bachelor degree in relevant discipline from a recognised university with an aggregate of at least 50% marks. Yes, you are eligible to pursue MJMC after completing BA (Hons. ) in political Science.

There are many courses to pursue after B.A. such as
Master of Arts (MA)
Master of Business Administration (MBA)
Master of Journalism and Mass Communication (MJMC)
Master of Fine Arts (MFA)
Masters/PG Diploma in Digital Marketing. LL.B. Bachelor of Education (B.Ed)
Creative Writing Courses
Master in Library Science etc.

Yes, you are eligible.

Top MA in Hindi Universities in India 2022
IGNOU Delhi - Indira Gandhi National Open University.
JMI New Delhi - Jamia Millia Islamia.
MSU Baroda - Maharaja Sayajirao University of Baroda.
LPU Jalandhar - Lovely Professional University.
BHU Varanasi - Banaras Hindu University.

Yes, you can do MBA in Banking and Finance after B.A. in Economics.

Yes, you can study MCA after completing B.A. But you need to have mathematics as one of your subjects at 10+2 level.

The highest salary package usually offered is 30-32 LPA. The lowest salary package offered is 3-3.5 LPA. Most of them are clustered with a salary package around 7-8 LPA.

If you want to continue your 2nd year with different subject that is not possible with present education system. You have to study different subject from the beginning that is from 1st year.