Science

The date is not confirmed yet.
You can wait for the exam or check here
https://www.shiksha.com/nursing/b-sc-nursing-chp

Courses that guarantee good jobs after graduation-
#1 B.Sc. Agriculture. #2 B.Sc. Horticulture. #3 BVSC (Veterinary Science)
#4 B.Sc. Forestry. #5 B.Sc. Biotechnology. #9 B.F.Sc. (Fisheries Science)
# B.Sc. Nursing
# B.Sc. Nautical Science.

Bachelor of Science in Nursing or B.Sc. Nursing is a 4-year undergraduate course. B.Sc. Nursing admission is based on entrance exams held between April-June. The minimum eligibility criterion for pursuing this course is the successful completion of 10+2 level of education in Physics, Chemistry, and Biology.

First, you should get your basics clear. For that read the theory, clear your concepts. You can refer to HC Verma for basics. Then you should practice different questions. I found book By BM Sharma from Engage Publication very useful. Also keep giving mock tests continuously. Try solving a variety of questions.

Yes, there is an entrance for admission to B.Sc nursing. You should check with universities according to your location. Some universities give admission to B.Sc. Nursing in accordance to your NEET score also.

Yes, you can do your BCA after 12th also. You can go from science, commerce or arts stream based on your interest.