Naval Officer

You can proceed with B.Sc. in Nautical Science which is a 3-year undergraduate course split into 6 semesters. Each year consists of 2 semesters and contains a thoroughly practical approach to all the concepts of Nautical Technology.
The admission procedure for B.Sc. in Nautical Science is not as simplistic as other undergraduate courses. We have tried to clarify it as much as we can below:
* First thing would be to shortlist a maritime institute or college that matches your location, financial capabilities, and other relevant preferences.
* Next step would be to clear the entrance exam (if any) as conducted by the university or college.
* The test is followed by a string of medical tests and psychometric examinations to assess the candidate's physical feasibility for the course.
* Once the candidate clears all the tests, he or she may need to undergo a brief pre-sea training programme before admission is confirmed.
If you are really interested in the course then here is the list of Best BSc Nautical Science Colleges in Maharashtra:https://campushunt.in/blog/best-bsc-nautical-science-colleges-in-maharashtra/
All the best

I think girls can go for Navy once they complete their graduation. If anyone want to enter into the field of civil services after class 12th, then he/she has to give the NDA entrance exam and girls cannot give the NDA entrance exam. NDA stands for National Defense Academy and it is entrance exam which is done after completion of 12th to go into the field of civil services. As there are three types of civil services that comes under NDA:
1. Indian Navy
2. Indian Air Force
3. Indian Military
But, girls can join the defense sector only and only after completion of their graduation. They can apply after completion of graduation through CDS entrance exam. If you need more information on this, would recommend you to surf the internet further.