Wardha

Here is the syllabus:
1. Childhood and Growing up: 101 4 Credits-100
2. Philosophical and Sociological Foundations
of Education: 103 4 Credits-100
3. Language Across the Curriculum: 105 2 Credits-100
4. Understanding Discipline and Subjects: 107 2 Credits-100
5. Pedagogy of a School Subject: 115-149 4 Credits-100
6. School Organisation and Management: 109 2 Credits-100
7 Understanding the Self: 155 2 Credits-100
8 PSE (Preliminary School Engagement): 157 2 Credits-100.

Yes, there is a lot of scope in interior designing. You can go for any of the multinational company of interior designing.

Candidates should have Bachelor's degree in Arts, Science and Commerce discipline with 50% marks and 45% marks for SC/ ST candidates or B.Tech degree with 55% marks or post-graduation degree with 50% marks in any discipline from recognized university are also eligible to apply.
Aspirants holding Integrated Dual Degree with minimum 55% marks from a recognized university are also eligible to apply.
More details can be found here https://www.shiksha.com/teaching-education/course/b-ed-in-hindi-mahatma-gandhi-antarrashtriya-hindi-vishwavidyalaya-wardha-273232

The eligibility is 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.

No, Diploma in Mandarin language is not offered.

BIT, Wardha is not a very famous college and it's also not in the list of top colleges across India.