How do I start preparing for NDA from the very start of class XI?

So my friend you should join the best academy for NDA Nearby you. As I have one Academy in my mind and it is Pioneer Academy.I think the best foundation for NDA is Pioneer Academy. And as you’re in class XI Pioneer Academy has weekdays as well as a weekend batch for the students like you who want to attend college and also want to do preparation for NDA. As they also have NCERT + Basic to advance batches and also Pioneer Academy is well known from the year 2009. Pioneer Academy is the top instructing establishment for NDA for composed and furthermore for SSB meetings and they have their foundation in (Thane, Dadar, Kaylan, Andheri, and Pune).
There is 'n' number of reasons for Pioneer Academy is very helpful for NDA preparation. Two or three of them are recorded under:
1. Prospectus astute inclusion of all subjects of NCERT-essential to propel, Foundation cum incorporated talks are taken.
2. Pioneer Academy also provides training for NDA stage 1 and stage 2 
3. Pioneer Academy also provides Printed Notes to all the NDA students.
4. As we know that, huge weightage is given to Current affairs, Pioneer academy have their own current affairs magazine called pathfinder where detailed analysis of current affairs is given, they distribute pathfinder consistently, which implies 52 magazines each year.
5. Test series is the main pillar of any institute, 150+ tests conducted per year 
6. Pioneer Academy does have a study room facility from 8 am to 8 pm where they maintain a comfortable study environment for candidates.
7. Pioneer Academy does have online classes as well, they have their own application Pioneer Live to watch the live lectures and recorded videos.
8. Pioneer Academy provides free 30 minutes counseling sessions at all branches in which they guide students about exams, exam post, exam pattern, syllabus, and other doubt points
Download Pioneer Academy Booklet for detailed information. 
With all these facilities I think Pioneer Academy is the top institute for the preparation of NDA in Mumbai and Pune.