Hi

KVPY is a scholarship program which encourages the students to take up their career in science.To begin with the preparation you should have a idea about the exam pattern and syllabus. Be consistent in your study. Understand your weaker areas and work on them. Time management is a big factor in these exams. Practice more and more tests and work on your time management. Make short notes of the formulas, important terms etc. Make your concepts clear.Practice mock tests.

For more information you can check the following link

https://www.google.com/amp/s/learn.careers360.com/science/how-to-prepare-for-kvpy-sx/amp/

All the best.