Nagpur

She must have completed 1st year, then she can try for 2nd year admission. For admission, you can contact directly to college.

Please click the link below for a related answer. It might help. https://ask.shiksha.com/can-i-pursue-diploma-in-gynae-and-obs-after-completing-bams-qna-3915468.

Yes, at this score there is 60% chances to get admission. If you are not getting admission on your JEE main score you can ask college authority for management quota seats but management seats are totally at the discretion of the college.

Approximately 300 marks will be sufficient for getting a good college.
Here is a link you can go through, it will be helpful.
https://www.shiksha.com/nursing/course/bsc-in-nursing-government-medical-college-nagpur-191849
Best of luck.

This is a very vague question as you need to look out for internships yourself. There is no portal which will inform you about the internships. It is better if you reach out the companies yourself and find a good internship.

No, you can't get seat, because the required marks to get a seat is more than 90.

See, in some of the government colleges, it may be possible but in the private colleges, there is nothing like that.

You need to fulfill the eligibility as below:
Eligibility, Qualification: Graduation
Additional Details
Mandatory Courses: B.Sc ( Agriculture) , BE / B.Tech, BCA, BA, M.Sc (Agriculture) , ME/M.Tech, MCA, MA.
Candidate must have 50% marks in graduation and 55% marks in Post-Graduation in one of the following:
B.Sc/B.Sc(Ag.)/ B.Tech/BE/ BCA/ BA with Geography or Mathematics or Statistics, as one of the subjects M.Sc/M.Sc (Ag.), M.Tech/ ME/ MCA/MA in Geography/ Mathematics/ Statistics.
Entrance Exam: BHU UET.